diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5b7d0bf7c..52610ac89 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -80,6 +80,7 @@ string(REPLACE "." ";" CTRANSLATE2_VERSION_LIST ${CTRANSLATE2_VERSION})
 list(GET CTRANSLATE2_VERSION_LIST 0 CTRANSLATE2_MAJOR_VERSION)
 
 if(MSVC)
+  add_compile_definitions(_USE_MATH_DEFINES) # required for M_PI
   if(BUILD_SHARED_LIBS)
     set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)
   else()