diff --git a/pegasus-2.5.1-fix_zseries_flags.patch b/pegasus-2.5.1-fix_zseries_flags.patch
new file mode 100644
index 0000000..49b86a2
--- /dev/null
+++ b/pegasus-2.5.1-fix_zseries_flags.patch
@@ -0,0 +1,16 @@
+--- pegasus/mak/platform_LINUX_ZSERIES64_GNU.mak.fix_zseries_flags	2006-01-30 11:16:23.000000000 -0500
++++ pegasus/mak/platform_LINUX_ZSERIES64_GNU.mak	2006-04-10 20:10:04.000000000 -0400
+@@ -35,4 +35,4 @@
+ 
+ ARCHITECTURE = zseries
+ 
+-FLAGS = -fsigned-char
++FLAGS += -fsigned-char
+--- pegasus/mak/platform_LINUX_ZSERIES_GNU.mak.fix_zseries_flags	2006-01-30 11:16:23.000000000 -0500
++++ pegasus/mak/platform_LINUX_ZSERIES_GNU.mak	2006-04-10 20:09:41.000000000 -0400
+@@ -35,4 +35,4 @@
+ 
+ ARCHITECTURE = zseries
+ 
+-FLAGS = -fsigned-char
++FLAGS += -fsigned-char