diff --git a/.circleci/config.yml b/.circleci/config.yml
index 36a7d32..bddab15 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -26,7 +26,7 @@ jobs:
             git clone https://github.com/tensorflow/mlir llvm-project/llvm/projects/mlir 
             mkdir llvm-project/build 
             cd llvm-project/build 
-            cmake -G Ninja ../llvm -DLLVM_ENABLE_RTTI=ON  -DLLVM_BUILD_EXAMPLES=OFF -DLLVM_TARGETS_TO_BUILD="host" 
+            cmake -G Ninja ../llvm -DLLVM_ENABLE_RTTI=ON  -DLLVM_BUILD_EXAMPLES=OFF -DLLVM_TARGETS_TO_BUILD="host" -DCMAKE_BUILD_TYPE=Release
             CMAKE_EXE_LINKER_FLAGS="-Wl,--reduce-memory-overheads -Wl,--hash-size=512" cmake --build . --target check-mlir -- -j 4
 
       - run: