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-rw-r--r--locale/programs/charmap.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/locale/programs/charmap.c b/locale/programs/charmap.c
index 073d458849..f76bc24709 100644
--- a/locale/programs/charmap.c
+++ b/locale/programs/charmap.c
@@ -159,7 +159,8 @@ charmap_read (const char *filename)
 				== 1)
 			    || fscanf (fp, "%% alias %as", &name) == 1)
 			  {
-			    if (strcasecmp (name, filename) == 0)
+			    if (filename != NULL
+				&& strcasecmp (name, filename) == 0)
 			      break;
 
 			    free (name);