1 files changed, 1 insertions, 1 deletions
diff --git a/src/stlfile.c b/src/stlfile.c
index 17b97fc..c55a2a0 100644
--- a/src/stlfile.c
+++ b/src/stlfile.c
@@ -83,7 +83,7 @@ consume_arg(char **start, char **end)
 	if (!*start) return NULL;
 	for (c = *start; *c && !isws(*c); c++);
 	tmp = *start;
-	*start = c + 1;
+	*start = c + (*c ? 1 : 0);
 	*end = c;
 	return tmp;
 }