diff --git a/3rdparty/singleapplication/CMakeLists.txt b/3rdparty/singleapplication/CMakeLists.txt
index ca8ea1cd..a5156727 100644
--- a/3rdparty/singleapplication/CMakeLists.txt
+++ b/3rdparty/singleapplication/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 2.8.11)
 set(CMAKE_CXX_STANDARD 11)
-if(${CMAKE_VERSION} VERSION_GREATER_EQUAL 3.12)
+if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.12)
   add_compile_definitions(QAPPLICATION_CLASS=QApplication)
 else()
   add_definitions(-DQAPPLICATION_CLASS=QApplication)