diff --git a/runtime/CMakeLists.txt b/runtime/CMakeLists.txt
index 1a015f05f9..ebbe152be1 100644
--- a/runtime/CMakeLists.txt
+++ b/runtime/CMakeLists.txt
@@ -48,7 +48,7 @@ if(LLVM_BUILD_EXTERNAL_COMPILER_RT AND EXISTS ${COMPILER_RT_SRC_ROOT}/)
   # them.
   get_cmake_property(variableNames VARIABLES)
   foreach(varaibleName ${variableNames})
-    if(${varaibleName} MATCHES "^COMPILER_RT")
+    if(varaibleName MATCHES "^COMPILER_RT")
       list(APPEND COMPILER_RT_PASSTHROUGH_VARIABLES
         -D${varaibleName}=${${varaibleName}})
     endif()