diff --git a/rtgui/CMakeLists.txt b/rtgui/CMakeLists.txt
index 923500777..05afd9af5 100644
--- a/rtgui/CMakeLists.txt
+++ b/rtgui/CMakeLists.txt
@@ -226,7 +226,7 @@ add_dependencies(rth-cli UpdateInfo)
 # Set executables targets properties, i.e. output filename and compile flags
 # for "Debug" builds, open a console in all cases for Windows version
 if((WIN32) AND NOT(UPPER_CMAKE_BUILD_TYPE STREQUAL "DEBUG"))
-set_target_properties(rth PROPERTIES LINK_FLAGS "-mwindows")
+    set_target_properties(rth PROPERTIES LINK_FLAGS "-mwindows")
 endif()
 set_target_properties(rth PROPERTIES COMPILE_FLAGS "${CMAKE_CXX_FLAGS}" OUTPUT_NAME rawtherapee)
 set_target_properties(rth-cli PROPERTIES COMPILE_FLAGS "${CMAKE_CXX_FLAGS}" OUTPUT_NAME rawtherapee-cli)