diff --git a/emulators/cannonball/Makefile b/emulators/cannonball/Makefile
index 2626fdfcd825..3078725872fc 100644
--- a/emulators/cannonball/Makefile
+++ b/emulators/cannonball/Makefile
@@ -1,42 +1,43 @@
 PORTNAME=	cannonball
-DISTVERSION=	0.32
+DISTVERSION=	0.34
+DISTVERSIONPREFIX=v
 CATEGORIES=	emulators games
 
 MAINTAINER=	fox@FreeBSD.org
 COMMENT=	Enhanced OutRun Engine
 
 LICENSE=	MAME-LICENSE
 LICENSE_NAME=	MAME license
 LICENSE_FILE=	${WRKSRC}/docs/license.txt
 LICENSE_PERMS=	dist-mirror no-dist-sell pkg-mirror no-pkg-sell auto-accept
 
 BUILD_DEPENDS=	${LOCALBASE}/include/boost/exception/all.hpp:devel/boost-libs
 
 USES=		cmake:insource gl pkgconfig sdl
 USE_SDL=	sdl2
 USE_GL=		gl glu
 
 CMAKE_ARGS+=	${WRKSRC}/cmake \
 		-DTARGET=linux.cmake
 
 CFLAGS+=	-I${LOCALBASE}/include
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	djyt
 
 BUILD_WRKSRC=		${WRKSRC}/cmake
 CONFIGURE_WRKSRC=	${WRKSRC}/cmake
 
 SUB_FILES=	${PORTNAME}.sh
 
 do-install:
 	${MKDIR} ${STAGEDIR}${DATADIR}/res
 	${MKDIR} ${STAGEDIR}${DATADIR}/conf
 	${INSTALL_DATA} ${WRKSRC}/cmake/res/tilemap.bin ${STAGEDIR}${DATADIR}/res/tilemap.bin
 	${INSTALL_DATA} ${WRKSRC}/cmake/res/tilepatch.bin ${STAGEDIR}${DATADIR}/res/tilepatch.bin
 	${INSTALL_DATA} ${WRKSRC}/cmake/config.xml ${STAGEDIR}${DATADIR}/conf/config.xml
 	${INSTALL_MAN} ${WRKSRC}/docs/cannonball.6 ${STAGEDIR}${MAN1PREFIX}/man/man6
 	${INSTALL_SCRIPT} ${WRKDIR}/${PORTNAME}.sh ${STAGEDIR}${PREFIX}/bin/${PORTNAME}
 	${INSTALL_PROGRAM} ${WRKSRC}/cmake/cannonball ${STAGEDIR}${PREFIX}/libexec
 
 .include <bsd.port.mk>
diff --git a/emulators/cannonball/distinfo b/emulators/cannonball/distinfo
index d40e78998ca0..6cf664b13330 100644
--- a/emulators/cannonball/distinfo
+++ b/emulators/cannonball/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1616733810
-SHA256 (djyt-cannonball-0.32_GH0.tar.gz) = 50a4316159f5651a18edc7aa1a8961f944ec4bf8170e8afd6cb231cbc182a7c2
-SIZE (djyt-cannonball-0.32_GH0.tar.gz) = 292602
+TIMESTAMP = 1619529584
+SHA256 (djyt-cannonball-v0.34_GH0.tar.gz) = e2cf8e21619b183a9fd835ae34ce65fb3d014c2fea37723fc8ba05681ed317ce
+SIZE (djyt-cannonball-v0.34_GH0.tar.gz) = 326020
diff --git a/emulators/cannonball/files/patch-src_main_sdl2_renderbase.cpp b/emulators/cannonball/files/patch-src_main_sdl2_renderbase.cpp
new file mode 100644
index 000000000000..9d2f244e2102
--- /dev/null
+++ b/emulators/cannonball/files/patch-src_main_sdl2_renderbase.cpp
@@ -0,0 +1,11 @@
+Fixes the error: no member named 'round' in namespace 'std'
+
+--- src/main/sdl2/renderbase.cpp.orig	2021-04-27 14:23:03 UTC
++++ src/main/sdl2/renderbase.cpp
+@@ -1,5 +1,6 @@
+ #include "renderbase.hpp"
+ #include <iostream>
++#include <cmath>
+ 
+ RenderBase::RenderBase()
+ {