diff --git a/BuildBotLib/cmake.py b/BuildBotLib/cmake.py
index c11fd32..5d1c29f 100644
--- a/BuildBotLib/cmake.py
+++ b/BuildBotLib/cmake.py
@@ -160,7 +160,7 @@ class CMake(Make):
         defines += [
             '-DCMAKE_PREFIX_PATH=$QTDIR',
             '-DCMAKE_XCODE_ATTRIBUTE_DEVELOPMENT_TEAM=$XCODE_DEVELOPMENT_TEAM',
-            '-DCMAKE_TOOLCHAIN_FILE=$CMAKE_TOOL_CHAIN_FILE/',
+            '-DCMAKE_TOOLCHAIN_FILE=$CMAKE_TOOL_CHAIN_FILE',
             '-B cmake_build'
         ]