Index: /trunk/src/VBox/Installer/win/Makefile.kmk
===================================================================
--- /trunk/src/VBox/Installer/win/Makefile.kmk	(revision 79706)
+++ /trunk/src/VBox/Installer/win/Makefile.kmk	(revision 79707)
@@ -1113,5 +1113,5 @@
 		'if ".%1" == "." (echo No .cab file specified & exit /b 1)' \
 		$(subst $(KBUILD_BIN_PATH),%KBUILD_BIN_PATH%,$(subst $(KBUILD_DEVTOOLS),%KBUILD_DEVTOOLS%, \
-		'( $(call VBOX_SIGN_EV_FILE_FN,%1,%~dp1\\) ) || exit /b1' \
+		'( $(call VBOX_SIGN_EV_FILE_FN,%1,%~dp1\) ) || exit /b1' \
 		) )