diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6f57f68af..8b025cc5f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -20,7 +20,7 @@ endif()
 cmake_policy( SET CMP0023 OLD )
 
 # Keep cmake 3.0 quiet
-if( ${CMAKE_VERSION} VERSION_LESS "3.0.0" )
+if( "${CMAKE_VERSION}" VERSION_LESS "3.0.0" )
     cmake_policy( SET CMP0043 OLD )
 endif()