diff --git a/src/insexpand.c b/src/insexpand.c
index 7066be8..19a4a21 100644
--- a/src/insexpand.c
+++ b/src/insexpand.c
@@ -1226,7 +1226,7 @@
     int		cur = -1;
     int		lead_len = 0;
     int		max_fuzzy_score = 0;
-    int		cur_cot_flags = get_cot_flags();
+    unsigned int cur_cot_flags = get_cot_flags();
     int		compl_no_select = (cur_cot_flags & COT_NOSELECT) != 0;
     int		compl_fuzzy_match = (cur_cot_flags & COT_FUZZY) != 0;
 
@@ -2925,7 +2925,7 @@
     int save_w_wrow = curwin->w_wrow;
     int save_w_leftcol = curwin->w_leftcol;
     int flags = CP_ORIGINAL_TEXT;
-    int cur_cot_flags = get_cot_flags();
+    unsigned int cur_cot_flags = get_cot_flags();
     int compl_longest = (cur_cot_flags & COT_LONGEST) != 0;
     int compl_no_insert = (cur_cot_flags & COT_NOINSERT) != 0;
     int compl_no_select = (cur_cot_flags & COT_NOSELECT) != 0;
@@ -4126,7 +4126,7 @@
 {
     int	    found_end = FALSE;
     compl_T *found_compl = NULL;
-    int	    cur_cot_flags = get_cot_flags();
+    unsigned int cur_cot_flags = get_cot_flags();
     int	    compl_no_select = (cur_cot_flags & COT_NOSELECT) != 0;
     int	    compl_fuzzy_match = (cur_cot_flags & COT_FUZZY) != 0;
 
@@ -4246,7 +4246,7 @@
     int	    advance;
     int	    started = compl_started;
     buf_T   *orig_curbuf = curbuf;
-    int	    cur_cot_flags = get_cot_flags();
+    unsigned int cur_cot_flags = get_cot_flags();
     int	    compl_no_insert = (cur_cot_flags & COT_NOINSERT) != 0;
     int	    compl_fuzzy_match = (cur_cot_flags & COT_FUZZY) != 0;