diff --git a/cmake/protobuf-lite.pc.cmake b/cmake/protobuf-lite.pc.cmake
index cbe5426afa43..9745cb89c7a7 100644
--- a/cmake/protobuf-lite.pc.cmake
+++ b/cmake/protobuf-lite.pc.cmake
@@ -7,5 +7,5 @@ Name: Protocol Buffers
 Description: Google's Data Interchange Format
 Version: @protobuf_VERSION@
 Libs: -L${libdir} -lprotobuf-lite @CMAKE_THREAD_LIBS_INIT@
-Cflags: -I${includedir} @CMAKE_THREAD_LIBS_INIT@
+Cflags: -I${includedir}
 Conflicts: protobuf
diff --git a/cmake/protobuf.pc.cmake b/cmake/protobuf.pc.cmake
index d33e98cca8f0..f068e6926e72 100644
--- a/cmake/protobuf.pc.cmake
+++ b/cmake/protobuf.pc.cmake
@@ -7,5 +7,5 @@ Name: Protocol Buffers
 Description: Google's Data Interchange Format
 Version: @protobuf_VERSION@
 Libs: -L${libdir} -lprotobuf @CMAKE_THREAD_LIBS_INIT@
-Cflags: -I${includedir} @CMAKE_THREAD_LIBS_INIT@
+Cflags: -I${includedir}
 Conflicts: protobuf-lite