diff --git a/dlls/cabinet/tests/fdi.c b/dlls/cabinet/tests/fdi.c
index 1f1c6e275d1..732f816bda3 100644
--- a/dlls/cabinet/tests/fdi.c
+++ b/dlls/cabinet/tests/fdi.c
@@ -776,7 +776,7 @@ static UINT CDECL fdi_mem_read(INT_PTR hf, void *pv, UINT cb)
 
 static UINT CDECL fdi_mem_write(INT_PTR hf, void *pv, UINT cb)
 {
-    static const char expected[12] = "Hello World!";
+    static const char expected[] = "Hello World!";
 
     trace("mem_write(%#lx,%p,%u)\n", hf, pv, cb);