1 files changed, 1 insertions, 1 deletions
diff --git a/expr.c b/expr.c
index 56e3988..4ca9820 100644
--- a/expr.c
+++ b/expr.c
@@ -273,7 +273,7 @@ LookupModMask(XPointer priv,
     else if (uStrCaseCmp(str, "none") == 0)
         val_rtrn->uval = 0;
     else if (LookupModIndex(priv, elem, field, type, val_rtrn))
-        val_rtrn->uval = (1 << val_rtrn->uval);
+        val_rtrn->uval = (1U << val_rtrn->uval);
     else if (priv != NULL)
     {
         LookupPriv *lpriv = (LookupPriv *) priv;