diff --git a/sysutils/gpart/files/patch-src_l64seek.h b/sysutils/gpart/files/patch-src_l64seek.h
new file mode 100644
index 000000000000..dce880f6f65d
--- /dev/null
+++ b/sysutils/gpart/files/patch-src_l64seek.h
@@ -0,0 +1,11 @@
+--- src/l64seek.h.orig	2000-12-13 22:56:07 UTC
++++ src/l64seek.h
+@@ -33,7 +33,7 @@
+ #endif
+ 
+ 
+-#if defined(__FreeBSD__)
++#if defined(__FreeBSD__) || defined(__DragonFly__)
+ 	typedef off_t off64_t;
+ #endif
+