diff --git a/cmake/OpenMWMacros.cmake b/cmake/OpenMWMacros.cmake
index fe2837a09..2fa86094f 100644
--- a/cmake/OpenMWMacros.cmake
+++ b/cmake/OpenMWMacros.cmake
@@ -172,7 +172,7 @@ macro (get_generator_is_multi_config VALUE)
 		if (CMAKE_VERSION VERSION_GREATER 3.9 OR CMAKE_VERSION VERSION_EQUAL 3.9)
 			get_cmake_property(${VALUE} GENERATOR_IS_MULTI_CONFIG)
 		else (CMAKE_VERSION VERSION_GREATER 3.9 OR CMAKE_VERSION VERSION_EQUAL 3.9)
-			list(LENGTH "${CMAKE_CONFIGURATION_TYPES}" ${VALUE})
+			list(LENGTH CMAKE_CONFIGURATION_TYPES ${VALUE})
 		endif (CMAKE_VERSION VERSION_GREATER 3.9 OR CMAKE_VERSION VERSION_EQUAL 3.9)
 	endif (DEFINED generator_is_multi_config_var)
 endmacro (get_generator_is_multi_config)