diff --git a/efunc.h b/efunc.h
index dd491e9..82b37b1 100644
--- a/efunc.h
+++ b/efunc.h
@@ -258,7 +258,7 @@ extern int storeproc(int f, int n);
 extern int execproc(int f, int n);
 extern int execbuf(int f, int n);
 extern int dobuf(struct buffer *bp);
-extern void freewhile(WHBLOCK *wp);
+extern void freewhile(struct while_block *wp);
 extern int execfile(int f, int n);
 extern int dofile(char *fname);
 extern int cbuf(int f, int n, int bufnum);
diff --git a/estruct.h b/estruct.h
index b530091..3317192 100644
--- a/estruct.h
+++ b/estruct.h
@@ -623,12 +623,12 @@ typedef struct VDESC {
 	the following structure
 */
 
-typedef struct WHBLOCK {
-	struct line *w_begin;		/* ptr to !while statement */
-	struct line *w_end;		/* ptr to the !endwhile statement */
-	int w_type;		/* block type */
-	struct WHBLOCK *w_next;	/* next while */
-} WHBLOCK;
+struct while_block {
+	struct line *w_begin;        /* ptr to !while statement */
+	struct line *w_end;          /* ptr to the !endwhile statement */
+	int w_type;		     /* block type */
+	struct while_block *w_next;  /* next while */
+};
 
 #define	BTWHILE		1
 #define	BTBREAK		2
diff --git a/exec.c b/exec.c
index 5e41272..fcbb313 100644
--- a/exec.c
+++ b/exec.c
@@ -430,9 +430,9 @@ int dobuf(struct buffer *bp)
 	int c;			/* temp character */
 	int force;		/* force TRUE result? */
 	struct window *wp;		/* ptr to windows to scan */
-	WHBLOCK *whlist;	/* ptr to !WHILE list */
-	WHBLOCK *scanner;	/* ptr during scan */
-	WHBLOCK *whtemp;	/* temporary ptr to a WHBLOCK */
+	struct while_block *whlist;	/* ptr to !WHILE list */
+	struct while_block *scanner;	/* ptr during scan */
+	struct while_block *whtemp;	/* temporary ptr to a struct while_block */
 	char *einit;		/* initial value of eline */
 	char *eline;		/* text of line to execute */
 	char tkn[NSTRING];	/* buffer to evaluate an expresion in */
@@ -465,7 +465,7 @@ int dobuf(struct buffer *bp)
 
 		/* if is a while directive, make a block... */
 		if (eline[0] == '!' && eline[1] == 'w' && eline[2] == 'h') {
-			whtemp = (WHBLOCK *) malloc(sizeof(WHBLOCK));
+			whtemp = (struct while_block *)malloc(sizeof(struct while_block));
 			if (whtemp == NULL) {
 			      noram:mlwrite
 				    ("%%Out of memory during while scan");
@@ -487,7 +487,7 @@ int dobuf(struct buffer *bp)
 				    ("%%!BREAK outside of any !WHILE loop");
 				goto failexit;
 			}
-			whtemp = (WHBLOCK *) malloc(sizeof(WHBLOCK));
+			whtemp = (struct while_block *)malloc(sizeof(struct while_block));
 			if (whtemp == NULL)
 				goto noram;
 			whtemp->w_begin = lp;
@@ -832,9 +832,9 @@ int dobuf(struct buffer *bp)
 /*
  * free a list of while block pointers
  *
- * WHBLOCK *wp;		head of structure to free
+ * struct while_block *wp;		head of structure to free
  */
-void freewhile(WHBLOCK *wp)
+void freewhile(struct while_block *wp)
 {
 	if (wp == NULL)
 		return;