diff --git a/docs/Makefile b/docs/Makefile
index 80bfb35..7654672 100644
--- a/docs/Makefile
+++ b/docs/Makefile
@@ -9,7 +9,7 @@ BUILDDIR      = ./
 AUTODOCDIR    = api
 AUTODOCBUILD  = sphinx-apidoc
 PROJECT       = preprocessor
-MODULEDIR     = ../src/data_trimmer
+MODULEDIR     = ../preprocessor
 
 # User-friendly check for sphinx-build
 ifeq ($(shell which $(SPHINXBUILD) >/dev/null 2>&1; echo $?), 1)