diff --git a/src/doc/Makefile b/src/doc/Makefile
index d28503eb0e883e6c879898c12dac07f91bd2df68..7a1bec105f4b0fe1d70cabd7e3cf5f1ceff93bee 100644
--- a/src/doc/Makefile
+++ b/src/doc/Makefile
@@ -45,4 +45,4 @@ doc-help:
 	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
 
 apidoc:
-	@$(SPHINXAPIDOC) -o _apidoc $(PY_BASEDIR)
+	@$(SPHINXAPIDOC) --force -o _apidoc $(PY_BASEDIR)