diff --git a/scripts/Makefile.fwinst b/scripts/Makefile.fwinst
index 6bf8e87..4d908d1 100644
--- a/scripts/Makefile.fwinst
+++ b/scripts/Makefile.fwinst
@@ -27,7 +27,7 @@ endif
 installed-mod-fw := $(addprefix $(INSTALL_FW_PATH)/,$(mod-fw))
 
 installed-fw := $(addprefix $(INSTALL_FW_PATH)/,$(fw-shipped-all))
-installed-fw-dirs := $(sort $(dir $(installed-fw))) $(INSTALL_FW_PATH)/.
+installed-fw-dirs := $(sort $(dir $(installed-fw))) $(INSTALL_FW_PATH)/./
 
 # Workaround for make < 3.81, where .SECONDEXPANSION doesn't work.
 PHONY += $(INSTALL_FW_PATH)/$$(%) install-all-dirs