diff --git a/libtcc.c b/libtcc.c
index 36986328..6027b36e 100644
--- a/libtcc.c
+++ b/libtcc.c
@@ -421,10 +421,6 @@ PUB_FUNC void tcc_memcheck(void)
 }
 #endif /* MEM_DEBUG */
 
-#define free(p) use_tcc_free(p)
-#define malloc(s) use_tcc_malloc(s)
-#define realloc(p, s) use_tcc_realloc(p, s)
-
 /********************************************************/
 /* dynarrays */
 
diff --git a/tcc.h b/tcc.h
index da385a3a..ec7860d7 100644
--- a/tcc.h
+++ b/tcc.h
@@ -1229,11 +1229,6 @@ PUB_FUNC void *tcc_realloc_debug(void *ptr, unsigned long size, const char *file
 PUB_FUNC char *tcc_strdup_debug(const char *str, const char *file, int line);
 #endif
 
-#define free(p) use_tcc_free(p)
-#define malloc(s) use_tcc_malloc(s)
-#define realloc(p, s) use_tcc_realloc(p, s)
-#undef strdup
-#define strdup(s) use_tcc_strdup(s)
 PUB_FUNC void _tcc_error_noabort(const char *fmt, ...) PRINTF_LIKE(1,2);
 PUB_FUNC NORETURN void _tcc_error(const char *fmt, ...) PRINTF_LIKE(1,2);
 PUB_FUNC void _tcc_warning(const char *fmt, ...) PRINTF_LIKE(1,2);