diff --git a/libtorrent-rasterbar-cmake.pc.in b/libtorrent-rasterbar-cmake.pc.in
index 7123efb98..ee5f51943 100644
--- a/libtorrent-rasterbar-cmake.pc.in
+++ b/libtorrent-rasterbar-cmake.pc.in
@@ -2,5 +2,5 @@ Name: libtorrent-rasterbar
 Description: Bittorrent library.
 Version: @VERSION@
 Libs: -L${CMAKE_INSTALL_PREFIX}/lib -ltorrent-rasterbar
-Cflags: -I${CMAKE_INSTALL_PREFIX}/include -I${CMAKE_INSTALL_PREFIX}/include/libtorrent @COMPILETIME_OPTIONS@ @CPPFLAGS@ @CXX_DEFINES@
+Cflags: -I${CMAKE_INSTALL_PREFIX}/include -I${CMAKE_INSTALL_PREFIX}/include/libtorrent @COMPILETIME_OPTIONS@ @CXX_DEFINES@