diff --git a/Makefile.in b/Makefile.in
index 6a336f74b..6433eadeb 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -459,7 +459,7 @@ share/man: $(HELP_SRC)
 	-mkdir share/man
 	touch share/man
 	-rm -Rf share/man/man1
-	./build_tools/build_documentation.sh Doxyfile.help ./doc_src ./share
+	PROJECT_NUMBER=`echo $(FISH_BUILD_VERSION)| sed "s/-.*//"` ./build_tools/build_documentation.sh Doxyfile.help ./doc_src ./share
 
 #
 # The build rules for installing/uninstalling fish
diff --git a/build_tools/build_documentation.sh b/build_tools/build_documentation.sh
index 76c19a04e..0c4a2aac8 100755
--- a/build_tools/build_documentation.sh
+++ b/build_tools/build_documentation.sh
@@ -86,7 +86,7 @@ done
 # Input is kept as . because we cd to the input directory beforehand
 # This prevents doxygen from generating "documentation" for intermediate directories
 DOXYPARAMS=$(cat <<EOF
-PROJECT_NUMBER=2.0.0
+PROJECT_NUMBER=$PROJECT_NUMBER
 INPUT=.
 OUTPUT_DIRECTORY=$OUTPUTDIR
 QUIET=YES