diff --git a/devel-docs/reference/gimp-ui/meson.build b/devel-docs/reference/gimp-ui/meson.build
index 803e74b148..89fd608070 100644
--- a/devel-docs/reference/gimp-ui/meson.build
+++ b/devel-docs/reference/gimp-ui/meson.build
@@ -25,6 +25,7 @@ gimp_ui_docs = custom_target('gimp-ui-docs',
     '--no-namespace-dir',
     '--content-dir=@0@'.format(meson.current_source_dir()),
     '--add-include-path=@0@'.format(meson.project_build_root() / 'libgimp'),
+    '--add-include-path=@0@'.format(get_option('prefix') / 'share' / 'gir-1.0'),
     '@INPUT@',
   ],
   depends: libgimp_gir[0],
diff --git a/devel-docs/reference/gimp/meson.build b/devel-docs/reference/gimp/meson.build
index fc7c6a6f77..1701723c55 100644
--- a/devel-docs/reference/gimp/meson.build
+++ b/devel-docs/reference/gimp/meson.build
@@ -23,6 +23,7 @@ gimp_docs = custom_target('gimp-docs',
     '--output-dir=@OUTPUT@',
     '--no-namespace-dir',
     '--content-dir=@0@'.format(meson.current_source_dir()),
+    '--add-include-path=@0@'.format(get_option('prefix') / 'share' / 'gir-1.0'),
     '@INPUT@',
   ],
   depend_files: [