diff --git a/dlls/kernel32/heap.c b/dlls/kernel32/heap.c
index 9375a2ef8a8..c3598aff2e1 100644
--- a/dlls/kernel32/heap.c
+++ b/dlls/kernel32/heap.c
@@ -1206,7 +1206,8 @@ BOOL WINAPI GlobalMemoryStatusEx( LPMEMORYSTATUSEX lpmemex )
     FILE *f;
 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__NetBSD__)
     unsigned long val;
-    int size_sys, mib[2];
+    int mib[2];
+    size_t size_sys;
 #elif defined(__APPLE__)
     unsigned int val;
     int mib[2];