diff --git a/src/dialogs/info.cpp b/src/dialogs/info.cpp
index d410661e..d79fe123 100644
--- a/src/dialogs/info.cpp
+++ b/src/dialogs/info.cpp
@@ -281,6 +281,9 @@ get_resource_info(struct terminal *term, void *data)
 #ifdef CONFIG_LIBSIXEL
 	add_format_to_string(&info, "\nSixel: calls: %ld active: %ld, size: %ld", get_sixel_total_allocs(), get_sixel_active(), get_sixel_size());
 #endif
+#ifdef CONFIG_MUJS
+	add_format_to_string(&info, "\nMuJS: calls: %ld active: %ld, size: %ld", get_mujs_total_allocs(), get_mujs_active(), get_mujs_size());
+#endif
 #endif
 
 #ifdef DEBUG_MEMLEAK
diff --git a/src/ecmascript/mujs.cpp b/src/ecmascript/mujs.cpp
index ecf0d36c..8bede9c6 100644
--- a/src/ecmascript/mujs.cpp
+++ b/src/ecmascript/mujs.cpp
@@ -50,6 +50,9 @@
 #include "terminal/tab.h"
 #include "terminal/terminal.h"
 #include "util/conv.h"
+#ifdef CONFIG_DEBUG
+#include "util/memcount.h"
+#endif
 #include "util/string.h"
 #include "viewer/text/draw.h"
 #include "viewer/text/form.h"
@@ -131,8 +134,11 @@ mujs_get_interpreter(struct ecmascript_interpreter *interpreter)
 {
 	assert(interpreter);
 
+#ifdef CONFIG_DEBUG
+	js_State *J = js_newstate(el_mujs_alloc, NULL, 0);
+#else
 	js_State *J = js_newstate(NULL, NULL, 0);
-
+#endif
 	if (!J) {
 		return NULL;
 	}
diff --git a/src/util/memcount.cpp b/src/util/memcount.cpp
index 51306120..dae16575 100644
--- a/src/util/memcount.cpp
+++ b/src/util/memcount.cpp
@@ -391,3 +391,66 @@ get_sixel_active(void)
 	return el_sixel_allocs.size();
 }
 #endif
+
+#ifdef CONFIG_MUJS
+static std::map<void *, uint64_t> el_mujs_allocs;
+static uint64_t el_mujs_total_allocs;
+static uint64_t el_mujs_size;
+
+void *
+el_mujs_alloc(void *memctx, void *ptr, int size)
+{
+	if (size == 0) {
+		if (!ptr) {
+			return NULL;
+		}
+		auto el = el_mujs_allocs.find(ptr);
+
+		if (el == el_mujs_allocs.end()) {
+			fprintf(stderr, "mujs free %p not found\n", ptr);
+			return NULL;
+		}
+		free(ptr);
+		el_mujs_allocs.erase(el);
+		return NULL;
+	}
+	size_t oldsize = 0;
+	if (ptr) {
+		auto el = el_mujs_allocs.find(ptr);
+
+		if (el == el_mujs_allocs.end()) {
+			fprintf(stderr, "mujs realloc %p not found\n", ptr);
+		} else {
+			oldsize = el->second;
+			el_mujs_allocs.erase(el);
+		}
+	}
+	void *ret = realloc(ptr, (size_t)size);
+
+	if (ret) {
+		el_mujs_allocs[ret] = (uint64_t)size;
+		el_mujs_total_allocs++;
+		el_mujs_size += size - oldsize;
+	}
+
+	return ret;
+}
+
+uint64_t
+get_mujs_total_allocs(void)
+{
+	return el_mujs_total_allocs;
+}
+
+uint64_t
+get_mujs_size(void)
+{
+	return el_mujs_size;
+}
+
+uint64_t
+get_mujs_active(void)
+{
+	return el_mujs_allocs.size();
+}
+#endif
diff --git a/src/util/memcount.h b/src/util/memcount.h
index b797d743..0bdc1bd6 100644
--- a/src/util/memcount.h
+++ b/src/util/memcount.h
@@ -46,6 +46,13 @@ uint64_t get_sixel_size(void);
 uint64_t get_sixel_active(void);
 #endif
 
+#ifdef CONFIG_MUJS
+void *el_mujs_alloc(void *memctx, void *ptr, int size);
+uint64_t get_mujs_total_allocs(void);
+uint64_t get_mujs_size(void);
+uint64_t get_mujs_active(void);
+#endif
+
 #ifdef __cplusplus
 }
 #endif