diff --git a/src/lib/util/corealloc.h b/src/lib/util/corealloc.h
index 5cd481824ed..ea33798d909 100644
--- a/src/lib/util/corealloc.h
+++ b/src/lib/util/corealloc.h
@@ -87,13 +87,16 @@ extern const zeromem_t zeromem;
 #ifndef NO_MEM_TRACKING
 // re-route classic malloc-style allocations
 #undef malloc
-#undef realloc
 #undef free
 
 #define malloc(x)       malloc_file_line(x, __FILE__, __LINE__, true, false, false)
-#define realloc(x,y)    __error_realloc_is_dangerous__
 #define free(x)         free_file_line(x, __FILE__, __LINE__, true)
 
+#if !defined(__APPLE__) // avoid conflicts with some 3rd-party #includes
+#undef realloc
+#define realloc(x,y)    __error_realloc_is_dangerous__
+#endif
+
 #if !defined(_MSC_VER) || _MSC_VER < 1900 // < VS2015
 #undef calloc
 #define calloc(x,y)     __error_use_auto_alloc_clear_or_global_alloc_clear_instead__