diff --git a/CMakeLists.txt b/CMakeLists.txt
index e742e439..0972409e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -546,7 +546,6 @@ if(WIN32)
   set_target_properties(lovr PROPERTIES LINK_FLAGS_RELEASE "/SUBSYSTEM:windows /ENTRY:mainCRTStartup")
   target_compile_definitions(lovr PUBLIC -D_CRT_SECURE_NO_WARNINGS)
   target_compile_definitions(lovr PUBLIC -D_CRT_NONSTDC_NO_WARNINGS)
-  target_compile_definitions(lovr PUBLIC -D_USE_MATH_DEFINES)
 
   if(MSVC_VERSION VERSION_LESS 1900)
     target_compile_definitions(lovr PUBLIC -Dinline=__inline -Dsnprintf=_snprintf)