diff --git a/headers_for_gateway.patch b/headers_for_gateway.patch
new file mode 100644
index 000000000..ad22b07ba
--- /dev/null
+++ b/headers_for_gateway.patch
@@ -0,0 +1,8 @@
+Index: src/cas/build/Makefile
+===================================================================
+RCS file: /cvs/G/EPICS/base-3.14.12/src/cas/build/Makefile,v
+retrieving revision 1.1.1.1
+diff -r1.1.1.1 Makefile
+28a29,30
+> INC += casCtx.h
+> INC += caHdrLargeArray.h
diff --git a/src/cas/build/Makefile b/src/cas/build/Makefile
index ab4a14d99..3770ba088 100644
--- a/src/cas/build/Makefile
+++ b/src/cas/build/Makefile
@@ -26,6 +26,8 @@ SRC_DIRS += $(CA)
 INC += casdef.h
 INC += casEventMask.h
 INC += caNetAddr.h
+INC += casCtx.h
+INC += caHdrLargeArray.h
 
 LIBSRCS += caServer.cc
 LIBSRCS += caServerI.cc