diff --git a/src/popupmnu.c b/src/popupmnu.c
index 2f2bde0..755dba4 100644
--- a/src/popupmnu.c
+++ b/src/popupmnu.c
@@ -368,7 +368,7 @@
     // Update the cursor position to be able to compute the popup menu
     // position.  The cursor line length may have changed because of the
     // inserted completion.
-    curwin->w_valid &= VALID_CROW|VALID_CHEIGHT;
+    curwin->w_valid &= ~(VALID_CROW|VALID_CHEIGHT);
     validate_cursor();
 }