diff --git a/src/screen.c b/src/screen.c
index 27f4848..06bda0d 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -2708,7 +2708,9 @@
     if (enc_dbcs == DBCS_JPNU)
 	new_ScreenLines2 = LALLOC_MULT(schar_T, (Rows + 1) * Columns);
     new_ScreenAttrs = LALLOC_MULT(sattr_T, (Rows + 1) * Columns);
-    new_ScreenCols = LALLOC_MULT(colnr_T, (Rows + 1) * Columns);
+    // Clear ScreenCols to avoid a warning for unitialized memory in
+    // jump_to_mouse().
+    new_ScreenCols = LALLOC_CLEAR_MULT(colnr_T, (Rows + 1) * Columns);
     new_LineOffset = LALLOC_MULT(unsigned, Rows);
     new_LineWraps = LALLOC_MULT(char_u, Rows);
     new_TabPageIdxs = LALLOC_MULT(short, Columns);