diff --git a/irc/bobot++/Makefile b/irc/bobot++/Makefile
index 3c0ebe0d2a3d..d75bc59925c8 100644
--- a/irc/bobot++/Makefile
+++ b/irc/bobot++/Makefile
@@ -16,8 +16,8 @@ MAINTAINER=	ports@FreeBSD.org
 COMMENT=	An IRC bot written in C++
 
 GNU_CONFIGURE=	yes
-CONFIGURE_ENV=	CPPFLAGS="${CXXFLAGS} -I${LOCALBASE}/include" \
-		LDFLAGS="-L${LOCALBASE}/lib"
+CONFIGURE_ENV=	CPPFLAGS="${CXXFLAGS} -I${LOCALBASE}/include ${PTHREAD_CFLAGS}" \
+		LDFLAGS="-L${LOCALBASE}/lib ${PTHREAD_LIBS}"
 
 .if defined(WITHOUT_GUILE)
 CONFIGURE_ARGS+=	--disable-script