diff --git a/CMakeLists.txt b/CMakeLists.txt
index 54eda0a32..8643d06f0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -30,6 +30,9 @@ if(COMMAND cmake_policy)
         cmake_policy(SET CMP0017 NEW)
     endif()
 
+    # INTERPROCEDURAL_OPTIMIZATION is enforced when enabled.
+    # Allows passing -DCMAKE_INTERPROCEDURAL_OPTIMIZATION=ON
+    cmake_policy(SET CMP0069 NEW)
 endif()
 
 IF(APPLE)