diff --git a/srcpkgs/trinity/template b/srcpkgs/trinity/template
index ce40fbff1a8..9739055753b 100644
--- a/srcpkgs/trinity/template
+++ b/srcpkgs/trinity/template
@@ -15,6 +15,10 @@ if [ "$CROSS_BUILD" ]; then
 	export CROSS_COMPILE=${XBPS_TARGET_TRIPLET}
 fi
 
+if [ "$XBPS_TARGET_LIBC" = "musl" ]; then
+	CFLAGS+=" -Dloff_t=off_t"
+fi
+
 do_install() {
 	vbin trinity
 	vdoc Documentation/HACKING.txt