diff --git a/games/bomberclone/Makefile b/games/bomberclone/Makefile
index 83345664d0e..9ea33f7f99a 100644
--- a/games/bomberclone/Makefile
+++ b/games/bomberclone/Makefile
@@ -1,4 +1,4 @@
-# $OpenBSD: Makefile,v 1.12 2017/05/04 21:06:43 espie Exp $
+# $OpenBSD: Makefile,v 1.13 2017/11/02 14:29:30 espie Exp $
 
 COMMENT=	bomberman clone with multiplayer mode
 
@@ -24,7 +24,7 @@ CONFIGURE_STYLE=gnu
 CONFIGURE_ARGS=	--disable-debug --disable-werror
 CONFIGURE_ENV=	CPPFLAGS="-I${LOCALBASE}/include" \
 		LDFLAGS="-L${LOCALBASE}/lib" \
-		LIBS="-pthread"
+		LIBS="-pthread -lm"
 CFLAGS +=	-fgnu89-inline
 
 .include <bsd.port.mk>