diff --git a/Makefile.inc.in b/Makefile.inc.in
index 764736f58..d8b3f4a0f 100644
--- a/Makefile.inc.in
+++ b/Makefile.inc.in
@@ -100,7 +100,7 @@ LIBS_LIBPULSE      = @LIBPULSE_LIBS@
 LIBS_LUA           = @LUAJIT_LIBS@
 LIBS_OPENAL        = @OPENAL_LIBS@
 LIBS_PORTAUDIO     = @PORTAUDIO_LIBS@
-LIBS_PTHREAD       = @PTHREAD_LIBS@
+LIBS_PTHREAD       = @PTHREAD_CFLAGS@ @PTHREAD_LIBS@
 LIBS_UCHARDET      = @UCHARDET_LIBS@
 
 ifeq (yes, $(BUILD_DARWIN))