diff --git a/tests/tests2/90_struct-init.c b/tests/tests2/90_struct-init.c
index 6bff8ab4..4a71a93d 100644
--- a/tests/tests2/90_struct-init.c
+++ b/tests/tests2/90_struct-init.c
@@ -375,7 +375,7 @@ typedef struct {
     unsigned int a;
     unsigned int : 32;
     unsigned int b;
-    unsigned long : 64;
+    unsigned long long : 64;
     unsigned int c;
 } tst_bf;