diff --git a/m-core.h b/m-core.h
index efc2f871..2d54b2e3 100644
--- a/m-core.h
+++ b/m-core.h
@@ -945,7 +945,7 @@ m_core_hash (const void *str, size_t wrdlen)
 # define M_MEMORY_ALLOC(type) ((type*)std::malloc (sizeof (type)))
 # define M_MEMORY_DEL(ptr)  std::free(ptr)
 # define M_MEMORY_REALLOC(type, ptr, n)         \
-  ((type*) M_UNLIKELY ((n) > SIZE_MAX / sizeof(type)) ? NULL : std::realloc ((ptr), (n)*sizeof (type)))
+  ((type*) (M_UNLIKELY ((n) > SIZE_MAX / sizeof(type)) ? NULL : std::realloc ((ptr), (n)*sizeof (type))))
 # define M_MEMORY_FREE(ptr) std::free(ptr)
 #else
 # include <stdlib.h>