--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -116,7 +116,7 @@
 #------------------------------------------------------------------------------
 # pkg-config support
 #------------------------------------------------------------------------------
-if(NOT WIN32)
+if(NOT MSVC)
   configure_file(
     ${CMAKE_CURRENT_SOURCE_DIR}/src/libspatialindex.pc.in
     ${CMAKE_CURRENT_BINARY_DIR}/libspatialindex.pc