diff --git a/CMakeLists.txt b/CMakeLists.txt
index dd59e957c..538954938 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -95,7 +95,6 @@ if(MHLO_EXTERNAL_PROJECT_BUILD)
   set(MLIR_MAIN_SRC_DIR ${LLVM_MAIN_SRC_DIR}/../mlir ) # --src-root
   set(MLIR_INCLUDE_DIR ${MLIR_MAIN_SRC_DIR}/include ) # --includedir
   set(MLIR_GENERATED_INCLUDE_DIR ${LLVM_BINARY_DIR}/tools/mlir/include)
-  set(MLIR_PDLL_TABLEGEN_EXE $<TARGET_FILE:mlir-pdll>)
   include_directories(SYSTEM ${MLIR_INCLUDE_DIR})
   include_directories(SYSTEM ${MLIR_GENERATED_INCLUDE_DIR})
   include_directories(SYSTEM ${MLIR_TABLEGEN_OUTPUT_DIR})