diff --git a/emulators/mupen64plus-core/Makefile b/emulators/mupen64plus-core/Makefile
index c80d606cb20a..5414931e8568 100644
--- a/emulators/mupen64plus-core/Makefile
+++ b/emulators/mupen64plus-core/Makefile
@@ -15,7 +15,7 @@ MAINTAINER?=	acm@FreeBSD.org
 COMMENT?=	Fork of Mupen64 Nintendo 64 emulator
 
 #PROJECTHOST=	bsdistfiles
-USES=		gmake pkgconfig
+USES+=		gmake pkgconfig
 USE_GL?=	yes
 USE_SDL?=	sdl2
 USE_LDCONFIG?=	yes
diff --git a/emulators/mupen64plus-rsp-cxd4/Makefile b/emulators/mupen64plus-rsp-cxd4/Makefile
index 99f7ca2db5da..7cca343516d5 100644
--- a/emulators/mupen64plus-rsp-cxd4/Makefile
+++ b/emulators/mupen64plus-rsp-cxd4/Makefile
@@ -15,7 +15,8 @@ MASTERDIR=	${.CURDIR}/../mupen64plus-core
 
 OPTIONS_DEFINE=	#
 
-MAKE_ENV+=	SSE=none	
+USES+=		compiler:c++11-lang
+MAKE_ENV+=	SSE=none
 CFLAGS+=	-I${LOCALBASE}/include -I${LOCALBASE}/include/${PORTNAME}
 LDFLAGS+=	-L${LOCALBASE}/lib