diff --git a/src/indent.c b/src/indent.c
index 79162bf..c6e3aaf 100644
--- a/src/indent.c
+++ b/src/indent.c
@@ -1952,7 +1952,7 @@
     {
 	(void)copy_option_part(&word, buf, LSIZE, ",");
 	len = (int)STRLEN(buf);
-	if (STRNCMP(buf, p, len) == 0 && p[len] == ' ')
+	if (STRNCMP(buf, p, len) == 0 && IS_WHITE_OR_NUL(p[len]))
 	    return TRUE;
     }
     return FALSE;