diff --git a/dlls/comctl32/listview.c b/dlls/comctl32/listview.c
index b8545fda2c6..6b897663504 100644
--- a/dlls/comctl32/listview.c
+++ b/dlls/comctl32/listview.c
@@ -1530,7 +1530,7 @@ static INT LISTVIEW_ProcessLetterKeys(LISTVIEW_INFO *infoPtr, WPARAM charCode, L
     if (!charCode || !keyData) return 0;
 
     /* only allow the valid WM_CHARs through */
-    if (!isalnum(charCode) &&
+    if (!isalnumW(charCode) &&
         charCode != '.' && charCode != '`' && charCode != '!' &&
         charCode != '@' && charCode != '#' && charCode != '$' &&
         charCode != '%' && charCode != '^' && charCode != '&' &&