diff --git a/Makefile b/Makefile
index e4b9b3e..b94a948 100644
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,7 @@ CC ?= cc
 CFLAGS ?= -Wall -O2 -ggdb
 
 #OPTFLAGS = -DREVISION=\"$(shell svnversion | awk 'BEGIN { RS=":" } { next } END { print $$1 }')\"
-OPTFLAGS = -DREVISION=\"$(shell echo '$Revision: 234$' | sed -e 's/\$Revision: \([0-9]\+\)\$$/\1/')\"
+OPTFLAGS = -DREVISION=\"$(shell echo '$$Revision: 234$$' | sed -e 's/\$$Revision: \([0-9]\+\)\$$$$/\1/')\"
 
 # Comment on non-gnu systems
 OPTFLAGS += -DHAVE_GETOPT_LONG