diff --git a/src/pass/inject_thread_bind.cc b/src/pass/inject_thread_bind.cc
index 075f0cf8964d0ad025f4a5589d77d636057ed49c..a463be237af2789482dd1cdde1269e157fe9afd6 100644
--- a/src/pass/inject_thread_bind.cc
+++ b/src/pass/inject_thread_bind.cc
@@ -1373,10 +1373,11 @@ class ScalarPeel : public IRMutator {
  public:
   Stmt Run(const Stmt &s) {
     Stmt res = Mutate(s);
-    if (!before_scalar_store_) {
+    if (!before_scalar_store_ || !find_multi_core_) {
       multi_core_body_ = s;
       return Stmt();
     }
+    CHECK(multi_core_body_.defined()) << "Error, multicore body is not defined.";
     return res;
   }