diff --git a/dlls/oledb32/tests/convert.c b/dlls/oledb32/tests/convert.c
index 28401e68c9a..8ec64d40ae5 100644
--- a/dlls/oledb32/tests/convert.c
+++ b/dlls/oledb32/tests/convert.c
@@ -3092,7 +3092,7 @@ static void test_getconversionsize(void)
     SAFEARRAYBOUND rgsabound[1];
     int i4 = 200;
     WORD i2 = 201;
-    char i1 = 203;
+    char i1 = (char)203;
     FLOAT f4 = 1.0;
     LONGLONG i8 = 202;
     DATE dbdate;