1 files changed, 4 insertions, 2 deletions
diff --git a/tcpdump.c b/tcpdump.c
index a9c2b7dc..bf4f2ef5 100644
--- a/tcpdump.c
+++ b/tcpdump.c
@@ -854,13 +854,15 @@ static char *
 get_next_file(FILE *VFile, char *ptr)
 {
 	char *ret;
+	size_t len;
 
 	ret = fgets(ptr, PATH_MAX, VFile);
 	if (!ret)
 		return NULL;
 
-	if (ptr[strlen(ptr) - 1] == '\n')
-		ptr[strlen(ptr) - 1] = '\0';
+	len = strlen (ptr);
+	if (len > 0 && ptr[len - 1] == '\n')
+		ptr[len - 1] = '\0';
 
 	return ret;
 }