1 files changed, 2 insertions, 0 deletions
diff --git a/strings.c b/strings.c
index 763b50b6..ac7446c8 100644
--- a/strings.c
+++ b/strings.c
@@ -89,6 +89,8 @@ mdoc_isescape(const char *p)
 		/* FALLTHROUGH */
 	case ('%'):
 		/* FALLTHROUGH */
+	case ('0'):
+		/* FALLTHROUGH */
 	case (' '):
 		/* FALLTHROUGH */
 	case ('|'):