diff --git a/lib.c b/lib.c
index b9e9913..ee8ecd7 100644
--- a/lib.c
+++ b/lib.c
@@ -74,6 +74,7 @@ static int routine_assert(struct context* ctx, int condition, int error, const c
 		if (!coro->panic) coro->panic = error;
 		while (*message) {
 			ctx->putchar(ctx, *message);
+			++message;
 		}
 		ctx->putchar(ctx, 10);
 	}