diff --git a/src/coreclr/jit/optimizer.cpp b/src/coreclr/jit/optimizer.cpp
index 06cff782a5ff5..0e9e06e810d4f 100644
--- a/src/coreclr/jit/optimizer.cpp
+++ b/src/coreclr/jit/optimizer.cpp
@@ -366,6 +366,10 @@ void Compiler::optUnmarkLoopBlocks(BasicBlock* begBlk, BasicBlock* endBlk)
             break;
         }
     }
+
+#if FEATURE_LOOP_ALIGN
+    assert(!begBlk->isLoopAlign());
+#endif
 }
 
 /*****************************************************************************************************