diff --git a/make/defs.mk b/make/defs.mk
index 8b161c2e..1f175b9e 100644
--- a/make/defs.mk
+++ b/make/defs.mk
@@ -402,7 +402,7 @@ INSTALLED_CGI         += $(addprefix $(INSTALL_CGIDIR)/,$(EXE_CGI))
 INSTALLATION_FILE_TYPES += HTML
 BUILD_HTMLDIR          = $(TOPDIR)/htdocs
 LOCAL_HTML            += $(filter-out $(DONT_INSTALL),$(wildcard *.html *.css *.php) $(IMAGES))
-HTML_SUBDIR           ?= $(shell pwd | $(SED) 's%.*/htdocs/%%')
+HTML_SUBDIR           ?= $(shell pwd | $(SED) 's%.*/htdocs\(/\|$$\)%%')
 ifeq ($(HTML_SUBDIR),)
 INSTALL_HTMLDIR        = $(PROJECT_HTMLDIR)
 else