diff --git a/docs/reference/shell/Makefile.am b/docs/reference/shell/Makefile.am
index 0733d782d..4527ef66e 100644
--- a/docs/reference/shell/Makefile.am
+++ b/docs/reference/shell/Makefile.am
@@ -125,7 +125,7 @@ EXTRA_DIST +=
 # Files not to distribute
 # for --rebuild-types in $(SCAN_OPTIONS), e.g. $(DOC_MODULE).types
 # for --rebuild-sections in $(SCAN_OPTIONS) e.g. $(DOC_MODULE)-sections.txt
-DISTCLEANFILES = $(DOC_MODULES).types
+DISTCLEANFILES = $(DOC_MODULE).types
 
 # Comment this out if you want 'make check' to test you doc status
 # and run some sanity checks