diff --git a/rbutil/mkamsboot/Makefile b/rbutil/mkamsboot/Makefile
index 7d794bde46..d1bed217ba 100644
--- a/rbutil/mkamsboot/Makefile
+++ b/rbutil/mkamsboot/Makefile
@@ -1,7 +1,7 @@
 
 #change for releases
 ifndef APPVERSION
-APPVERSION=`../../tools/version.sh`
+APPVERSION=`../../tools/version.sh ../../`
 endif
 
 # We use the UCL code available in the Rockbox tools/ directory