diff --git a/astro/phd2/files/patch-thirdparty_thirdparty.cmake b/astro/phd2/files/patch-thirdparty_thirdparty.cmake
new file mode 100644
index 000000000000..27dee2b08db2
--- /dev/null
+++ b/astro/phd2/files/patch-thirdparty_thirdparty.cmake
@@ -0,0 +1,20 @@
+Fix compilation against libidngi 1.9.1
+
+In file included from /wrkdirs/usr/ports/astro/phd2/work/phd2-2.6.9dev5/stepguider_sxao_indi.cpp:40:
+In file included from /wrkdirs/usr/ports/astro/phd2/work/phd2-2.6.9dev5/phdindiclient.h:37:
+/usr/local/include/libindi/baseclient.h:27:10: error: 'indimacros.h' file not found with <angled> include; use "quotes" instead
+#include <indimacros.h>
+         ^
+1 warning and 1 error generated.
+
+--- thirdparty/thirdparty.cmake.orig	2021-08-06 09:18:28 UTC
++++ thirdparty/thirdparty.cmake
+@@ -660,7 +660,7 @@ else()
+     find_package(INDI 0.9 REQUIRED)
+     # source files include <libindi/baseclient.h> so we need the libindi parent directory in the include directories
+     get_filename_component(INDI_INCLUDE_PARENT_DIR ${INDI_INCLUDE_DIR} DIRECTORY)
+-    include_directories(${INDI_INCLUDE_PARENT_DIR})
++    include_directories(${INDI_INCLUDE_PARENT_DIR} ${INDI_INCLUDE_DIR})
+     if(INDI_VERSION VERSION_LESS "1.4")
+       set(PHD_LINK_EXTERNAL ${PHD_LINK_EXTERNAL} ${INDI_CLIENT_LIBRARIES} ${INDI_LIBRARIES})
+     else(INDI_VERSION VERSION_LESS "1.4")