diff --git a/src/tools/pginclude/cpluspluscheck b/src/tools/pginclude/cpluspluscheck
index f0841fbc29..bffca18890 100755
--- a/src/tools/pginclude/cpluspluscheck
+++ b/src/tools/pginclude/cpluspluscheck
@@ -171,6 +171,8 @@ do
 		EXTRAINCLUDES="$python_includespec" ;;
 	    src/interfaces/ecpg/*)
 		EXTRAINCLUDES="-I $builddir/src/interfaces/ecpg/include -I $srcdir/src/interfaces/ecpg/include" ;;
+		src/backend/parser/*)
+		EXTRAINCLUDES="-I $builddir/src/backend/parser/" ;;
 		src/backend/utils/adt/*)
 		EXTRAINCLUDES="-I $builddir/src/backend/utils/adt/" ;;
 	    *)
diff --git a/src/tools/pginclude/headerscheck b/src/tools/pginclude/headerscheck
index 56c78b7cca..bd45ee5e5c 100755
--- a/src/tools/pginclude/headerscheck
+++ b/src/tools/pginclude/headerscheck
@@ -154,6 +154,8 @@ do
 		EXTRAINCLUDES="$python_includespec" ;;
 	    src/interfaces/ecpg/*)
 		EXTRAINCLUDES="-I $builddir/src/interfaces/ecpg/include -I $srcdir/src/interfaces/ecpg/include" ;;
+		src/backend/parser/*)
+		EXTRAINCLUDES="-I $builddir/src/backend/parser/" ;;
 		src/backend/utils/adt/*)
 		EXTRAINCLUDES="-I $builddir/src/backend/utils/adt/" ;;
 	    *)