diff --git a/sysutils/wipe/Makefile b/sysutils/wipe/Makefile
index e5ae9df927f87..d1007370d83e7 100644
--- a/sysutils/wipe/Makefile
+++ b/sysutils/wipe/Makefile
@@ -15,4 +15,9 @@ PKG_INSTALLATION_TYPES=	overwrite pkgviews
 
 GNU_CONFIGURE=		yes
 
+.include "../../mk/bsd.prefs.mk"
+.if ${OPSYS} == "SunOS"
+MAKE_ENV+=		DEFINES="-Du_int32_t=uint32_t"
+.endif
+
 .include "../../mk/bsd.pkg.mk"