diff --git a/cmake/Modules/GrBoost.cmake b/cmake/Modules/GrBoost.cmake
index d2e91a6..fcac5cf 100644
--- a/cmake/Modules/GrBoost.cmake
+++ b/cmake/Modules/GrBoost.cmake
@@ -87,7 +87,7 @@ set(Boost_NOGO_VERSIONS
   )
 
 foreach(ver ${Boost_NOGO_VERSIONS})
-  if(${Boost_VERSION} EQUAL ${ver})
+  if("${Boost_VERSION}" STREQUAL "${ver}")
     if(NOT ENABLE_BAD_BOOST)
       MESSAGE(STATUS "WARNING: Found a known bad version of Boost (v${Boost_VERSION}). Disabling.")
       set(Boost_FOUND FALSE)
@@ -95,5 +95,5 @@ foreach(ver ${Boost_NOGO_VERSIONS})
       MESSAGE(STATUS "WARNING: Found a known bad version of Boost (v${Boost_VERSION}). Continuing anyway.")
       set(Boost_FOUND TRUE)
     endif(NOT ENABLE_BAD_BOOST)
-  endif(${Boost_VERSION} EQUAL ${ver})
+  endif("${Boost_VERSION}" STREQUAL "${ver}")
 endforeach(ver)