diff --git a/sdk/tlibc/stdlib/malloc.c b/sdk/tlibc/stdlib/malloc.c
index c222e6553b..1e94802e04 100755
--- a/sdk/tlibc/stdlib/malloc.c
+++ b/sdk/tlibc/stdlib/malloc.c
@@ -733,7 +733,7 @@ typedef int LONG;
 #define NO_MALLINFO 0
 #endif  /* NO_MALLINFO */
 #ifndef MALLINFO_FIELD_TYPE
-#define MALLINFO_FIELD_TYPE size_t
+#define MALLINFO_FIELD_TYPE int
 #endif  /* MALLINFO_FIELD_TYPE */
 #ifndef NO_MALLOC_STATS
 #define NO_MALLOC_STATS 0