diff --git a/src/document/document.c b/src/document/document.c
index 6099b07d..2a616b59 100644
--- a/src/document/document.c
+++ b/src/document/document.c
@@ -282,7 +282,7 @@ reset_document(struct document *document)
 ///	done_document_options(&document->options);
 
 	while (!list_empty(document->forms)) {
-		done_form(document->forms.next);
+		done_form((struct form *)document->forms.next);
 	}
 
 #ifdef CONFIG_CSS
@@ -352,7 +352,7 @@ done_document(struct document *document)
 	done_document_options(&document->options);
 
 	while (!list_empty(document->forms)) {
-		done_form(document->forms.next);
+		done_form((struct form *)document->forms.next);
 	}
 
 #ifdef CONFIG_CSS
diff --git a/src/document/html/parser.c b/src/document/html/parser.c
index ce696b7b..e89454c6 100644
--- a/src/document/html/parser.c
+++ b/src/document/html/parser.c
@@ -205,7 +205,7 @@ void
 import_css_stylesheet(struct css_stylesheet *css, struct uri *base_uri,
 		      const char *unterminated_url, int len)
 {
-	struct html_context *html_context = css->import_data;
+	struct html_context *html_context = (struct html_context *)css->import_data;
 	char *url;
 	char *import_url;
 	struct uri *uri;
@@ -602,7 +602,7 @@ look_for_link(char **pos, char *eof, struct menu_item **menu,
 
 	ld->target = target;
 	for (nmenu = 0; !mi_is_end_of_menu(&(*menu)[nmenu]); nmenu++) {
-		struct link_def *ll = (*menu)[nmenu].data;
+		struct link_def *ll = (struct link_def *)(*menu)[nmenu].data;
 
 		if (!strcmp(ll->link, ld->link) &&
 		    !strcmp(ll->target, ld->target)) {
@@ -727,7 +727,7 @@ void
 done_html_parser_state(struct html_context *html_context,
                        void *state)
 {
-	struct html_element *element = state;
+	struct html_element *element = (struct html_element *)state;
 
 	html_context->line_breax = 1;
 
@@ -859,7 +859,7 @@ done_html_parser(struct html_context *html_context)
 	mem_free(html_context->base_target);
 	done_uri(html_context->base_href);
 
-	kill_html_stack_item(html_context, html_context->stack.next);
+	kill_html_stack_item(html_context, (struct html_element *)html_context->stack.next);
 
 	assertm(list_empty(html_context->stack),
 		"html stack not empty after operation");
diff --git a/src/document/html/parser/forms.c b/src/document/html/parser/forms.c
index e8e99385..43f0c234 100644
--- a/src/document/html/parser/forms.c
+++ b/src/document/html/parser/forms.c
@@ -339,7 +339,7 @@ do_html_select(char *attr, char *html,
 	       char *eof, char **end,
 	       struct html_context *html_context)
 {
-	struct conv_table *ct = html_context->special_f(html_context, SP_TABLE, NULL);
+	struct conv_table *ct = (struct conv_table *)html_context->special_f(html_context, SP_TABLE, NULL);
 	struct el_form_control *fc;
 	struct string lbl = NULL_STRING, orig_lbl = NULL_STRING;
 	char **values = NULL;
diff --git a/src/document/html/parser/general.c b/src/document/html/parser/general.c
index ebf6aa1d..6d6594a6 100644
--- a/src/document/html/parser/general.c
+++ b/src/document/html/parser/general.c
@@ -1119,7 +1119,7 @@ html_frameset(struct html_context *html_context, char *a,
 
 	fp.parent = html_top->frameset;
 	if (fp.x && fp.y) {
-		html_top->frameset = html_context->special_f(html_context, SP_FRAMESET, &fp);
+		html_top->frameset = (struct frameset_desc *)html_context->special_f(html_context, SP_FRAMESET, &fp);
 	}
 	mem_free_if(fp.width);
 	mem_free_if(fp.height);
diff --git a/src/document/html/parser/stack.c b/src/document/html/parser/stack.c
index 3003ab67..bf7fce67 100644
--- a/src/document/html/parser/stack.c
+++ b/src/document/html/parser/stack.c
@@ -149,7 +149,7 @@ void
 html_stack_dup(struct html_context *html_context, enum html_element_mortality_type type)
 {
 	struct html_element *e;
-	struct html_element *ep = html_context->stack.next;
+	struct html_element *ep = (struct html_element *)html_context->stack.next;
 
 	assertm(ep && (void *) ep != &html_context->stack, "html stack empty");
 	if_assert_failed return;
diff --git a/src/document/html/renderer.c b/src/document/html/renderer.c
index 62f94122..182223ab 100644
--- a/src/document/html/renderer.c
+++ b/src/document/html/renderer.c
@@ -1511,7 +1511,7 @@ new_link(struct html_context *html_context, char *name, int namelen)
 		 * though, so we can safely just take that. */
 		form = fc->form;
 		if (!form && !list_empty(document->forms))
-			form = document->forms.next;
+			form = (struct form *)document->forms.next;
 		link->target = null_or_stracpy(form ? form->target : NULL);
 	}
 
@@ -2100,7 +2100,7 @@ html_special_form_control(struct part *part, struct el_form_control *fc)
 		add_to_list(part->document->forms, form);
 	}
 	/* Attach this form control to the last form encountered. */
-	form = part->document->forms.next;
+	form = (struct form *)part->document->forms.next;
 	fc->form = form;
 	add_to_list(form->items, fc);
 }
@@ -2495,7 +2495,7 @@ format_html_part(struct html_context *html_context,
 #endif
 
 	if (document) {
-		struct node *node = document->nodes.next;
+		struct node *node = (struct node *)document->nodes.next;
 
 		node->box.height = y - node->box.y + part->box.height;
 	}
diff --git a/src/document/html/tables.c b/src/document/html/tables.c
index d5a7db99..85a2ef04 100644
--- a/src/document/html/tables.c
+++ b/src/document/html/tables.c
@@ -867,7 +867,7 @@ draw_table_cell(struct table *table, int col, int row, int x, int y,
 #endif
 	}
 
-	state = init_html_parser_state(html_context, ELEMENT_DONT_KILL,
+	state = (struct html_element *)init_html_parser_state(html_context, ELEMENT_DONT_KILL,
 	                               cell->align, 0, 0);
 
 	if (cell->is_header) elformat.style.attr |= AT_BOLD;
@@ -1301,7 +1301,7 @@ format_table(char *attr, char *html, char *eof,
 	 * Otherwise i.e. <form> tags between <table> and <tr> are broken. */
 	draw_table_bad_html(html_context, table);
 
-	state = init_html_parser_state(html_context, ELEMENT_DONT_KILL,
+	state = (struct html_element *)init_html_parser_state(html_context, ELEMENT_DONT_KILL,
 	                               ALIGN_LEFT, 0, 0);
 
 	margins = /*par_elformat.blockquote_level + */par_elformat.leftmargin + par_elformat.rightmargin;
@@ -1331,7 +1331,7 @@ format_table(char *attr, char *html, char *eof,
 		goto ret2;
 	}
 
-	node = part->document->nodes.next;
+	node = (struct node *)part->document->nodes.next;
 	node->box.height = part->box.y - node->box.y + part->cy;
 
 	indent = get_table_indent(html_context, table);
diff --git a/src/document/plain/renderer.c b/src/document/plain/renderer.c
index ad7f2c86..89086d31 100644
--- a/src/document/plain/renderer.c
+++ b/src/document/plain/renderer.c
@@ -115,7 +115,7 @@ check_link_word(struct document *document, char *uri, int length,
 {
 	struct uri test;
 	char *where = NULL;
-	char *mailto = memchr(uri, '@', length);
+	char *mailto = (char *)memchr(uri, '@', length);
 	int keep = uri[length];
 	struct link *new_link;
 
diff --git a/src/document/refresh.c b/src/document/refresh.c
index a323121e..1fcd01ab 100644
--- a/src/document/refresh.c
+++ b/src/document/refresh.c
@@ -67,7 +67,7 @@ done_document_refresh(struct document_refresh *refresh)
 static void
 do_document_refresh(void *data)
 {
-	struct document_view *doc_view = data;
+	struct document_view *doc_view = (struct document_view *)data;
 	struct document_refresh *refresh = doc_view->document->refresh;
 	struct type_query *type_query;
 
diff --git a/src/document/renderer.c b/src/document/renderer.c
index a6e3dc84..8c0f53a2 100644
--- a/src/document/renderer.c
+++ b/src/document/renderer.c
@@ -553,7 +553,7 @@ render_document_frames(struct session *ses, int no_cache)
 static int
 comp_links(const void *v1, const void *v2)
 {
-	const struct link *l1 = v1, *l2 = v2;
+	const struct link *l1 = (const struct link *)v1, *l2 = (const struct link *)v2;
 
 	assert(l1 && l2);
 	if_assert_failed return 0;