diff --git a/Makefile b/Makefile
index dc2780d..42154ad 100644
--- a/Makefile
+++ b/Makefile
@@ -8,7 +8,7 @@ VERSION := $(shell cat version)
 # current date for stamping output
 DATE = $(shell date +%Y-%m-%d)
 # revision based on number of changes on schematic or board layout and current git commit
-REVISION := $(shell git log --pretty=oneline "${NAME}.kicad_sch" "${NAME}.kicad_pcb" | wc -l) $(shell git rev-parse --short HEAD)
+REVISION := $(shell git log --pretty=oneline "${NAME}.kicad_sch" "${NAME}.kicad_pcb" | wc -l)
 
 # generate file with version information
 VERSIONED_EXT = kicad_sch kicad_pcb kicad_pro json