1 files changed, 1 insertions, 1 deletions
diff --git a/parse.y b/parse.y
index 88e72de4bf..e1c047029b 100644
--- a/parse.y
+++ b/parse.y
@@ -6634,7 +6634,7 @@ parser_yylex(struct parser_params *parser)
 		if (c == 'o' || c == 'O') {
 		    /* prefixed octal */
 		    c = nextc();
-		    if (c == '_') {
+		    if (c == '_' || !ISDIGIT(c)) {
 			yyerror("numeric literal without digits");
 		    }
 		}