diff --git a/dev-util/gperf/gperf-3.0.4-haiku.diff b/dev-util/gperf/gperf-3.0.4-haiku.diff
new file mode 100644
index 000000000..21804f037
--- /dev/null
+++ b/dev-util/gperf/gperf-3.0.4-haiku.diff
@@ -0,0 +1,12 @@
+diff -urN gperf-3.0.4/tests/test2.c gperf-3.0.4-haiku/tests/test2.c
+--- gperf-3.0.4/tests/test2.c	2009-06-25 12:10:46.000000000 +0000
++++ gperf-3.0.4-haiku/tests/test2.c	2009-06-25 12:08:34.000000000 +0000
+@@ -11,7 +11,7 @@
+ #if !defined O_BINARY && defined _O_BINARY
+ # define O_BINARY _O_BINARY
+ #endif
+-#ifdef __BEOS__
++#if defined __BEOS__ || defined __HAIKU__
+ # undef O_BINARY
+ #endif
+ #if O_BINARY