diff --git a/lib/libtcc1.c b/lib/libtcc1.c
index 17e410d5..a5fee7b9 100644
--- a/lib/libtcc1.c
+++ b/lib/libtcc1.c
@@ -105,7 +105,7 @@ union double_long {
 
 union float_long {
     float f;
-    long l;
+    unsigned int l;
 };
 
 /* XXX: we don't support several builtin supports for now */