diff --git a/firmware/common/scripts/prompt.py b/firmware/common/scripts/prompt.py
index 2826bab5..1d358377 100644
--- a/firmware/common/scripts/prompt.py
+++ b/firmware/common/scripts/prompt.py
@@ -27,9 +27,8 @@
 print("//\n//\tThis file is automatically generated\n//")
 print("#define PROMPT \"Morpheus Firmware: {0}\\r\"".format(version))
 
-
-m = re.match("^v(\\d+)\\.(\\d+)\\-(\\d+).*$",plainVersion)
-assert m is not None,"Cannot parse version string"
+m = re.match("^v(\\d+)\\.(\\d+)\\-(\\d+).*$",plainVersion+"-0")
+assert m is not None,"Cannot parse version string "+plainVersion
 
 print("#define VERSION_MAJOR ({0})".format(m.group(1)))
 print("#define VERSION_MINOR ({0})".format(m.group(2)))