diff --git a/games/spacejunk/Makefile b/games/spacejunk/Makefile
index 1664a897cb1c..c5bb711c2843 100644
--- a/games/spacejunk/Makefile
+++ b/games/spacejunk/Makefile
@@ -16,11 +16,11 @@ LICENSE_FILE=	${WRKSRC}/COPYING
 BROKEN_aarch64=	Fails to compile: error: _compile_time_assert__ declared as an array with a negative size
 BROKEN_sparc64=	Doesn't compile on sparc64
 
-USES=		localbase
+USES=		dos2unix localbase
+USE_CXXSTD=	c++98
 GNU_CONFIGURE=	yes
 USE_SDL=	sdl mixer image
 
-CXXFLAGS+=	-Wno-c++11-narrowing
 CXXFLAGS+=	-O0  # XXX: segfaults with optimization, need to investigate
 
 SUB_FILES=	spacejunk
diff --git a/games/spacejunk/files/patch-src_pmask.h b/games/spacejunk/files/patch-src_pmask.h
new file mode 100644
index 000000000000..9eedafb99492
--- /dev/null
+++ b/games/spacejunk/files/patch-src_pmask.h
@@ -0,0 +1,11 @@
+--- src/pmask.h.orig	2018-10-16 15:21:01 UTC
++++ src/pmask.h
+@@ -36,7 +36,7 @@ extern "C" {
+ //e.g. 4 for 16-bit ints, 5 for 32-bit ints, 6 for 64-bit ints
+ //don't worry about setting it incorrectly
+ //you'll get a compile error if you do, not a run-time error
+-#if defined(__alpha__) || defined(__ia64__) || defined(__x86_64__)
++#if defined(__alpha__) || defined(__ia64__) || defined(__x86_64__) || defined(__powerpc64__)
+ #define MASK_WORD_BITBITS 6
+ #else
+ #define MASK_WORD_BITBITS 5