diff --git a/libupnp.pc.in b/libupnp.pc.in
index 9ef5383..227f354 100644
--- a/libupnp.pc.in
+++ b/libupnp.pc.in
@@ -6,6 +6,6 @@ includedir=@includedir@
 Name: libupnp
 Description: Linux SDK for UPnP Devices
 Version: @VERSION@
-Libs: @PTHREAD_LIBS@ -L${libdir} -lupnp -lthreadutil -lixml 
+Libs: @PTHREAD_CFLAGS@ @PTHREAD_LIBS@ -L${libdir} -lupnp -lthreadutil -lixml 
 Cflags: @PTHREAD_CFLAGS@ -I${includedir}/upnp