diff --git a/dlls/msi/tests/db.c b/dlls/msi/tests/db.c
index c2681254341..8f0b75f23da 100644
--- a/dlls/msi/tests/db.c
+++ b/dlls/msi/tests/db.c
@@ -990,7 +990,7 @@ static void test_streamtable(void)
 static void test_where(void)
 {
     MSIHANDLE hdb = 0, rec;
-    LPSTR query;
+    LPCSTR query;
     UINT r;
 
     hdb = create_db();