diff --git a/qrenderdoc/CMakeLists.txt b/qrenderdoc/CMakeLists.txt
index ac68310e2..00174a65c 100644
--- a/qrenderdoc/CMakeLists.txt
+++ b/qrenderdoc/CMakeLists.txt
@@ -53,8 +53,8 @@ set(Python_ADDITIONAL_VERSIONS 3.4 3.5 3.6)
 find_package(PythonInterp 3 REQUIRED)
 find_package(PythonLibs 3 REQUIRED)
 # we also need python3-config for swig
-if(NOT EXISTS "${PYTHON_EXECUTABLE}-config" AND NOT EXISTS "${PYTHON_EXECUTABLE}${PYTHON_VERSION_MAJOR}${PYTHON_VERSION_MINOR}-config")
-    message(FATAL_ERROR "We require ${PYTHON_EXECUTABLE}-config or ${PYTHON_EXECUTABLE}${PYTHON_VERSION_MAJOR}${PYTHON_VERSION_MINOR}-config to build swig, please install the python dev package for your system.")
+if(NOT EXISTS "${PYTHON_EXECUTABLE}-config" AND NOT EXISTS "${PYTHON_EXECUTABLE}.${PYTHON_VERSION_MINOR}-config")
+    message(FATAL_ERROR "We require ${PYTHON_EXECUTABLE}-config or ${PYTHON_EXECUTABLE}.${PYTHON_VERSION_MINOR}-config to build swig, please install the python dev package for your system.")
 endif()
 
 include(ExternalProject)