diff --git a/LUFA/makefile b/LUFA/makefile
index 5461111aeb..edb602f886 100644
--- a/LUFA/makefile
+++ b/LUFA/makefile
@@ -9,7 +9,7 @@
 #  Makefile for the LUFA library itself.
 # ---------------------------------------
 
-LUFA_VERSION_NUM        := $(shell grep LUFA_VERSION_STRING Version.h | cut -d'"' -f2)
+LUFA_VERSION_NUM         = $(shell grep $(LUFA_PATH)/LUFA_VERSION_STRING Version.h | cut -d'"' -f2)
 EXCLUDE_FROM_EXPORT     := Documentation DoxygenPages CodeTemplates Build StudioIntegration *.conf *.tar *.o *.d *.lss *.lst *.hex *.elf *.hex *.eep *.map *.bin
 
 # Default target - no default action when attempting to build the core directly