diff --git a/AMBuildScript b/AMBuildScript
index d8f1c1ee..e00bdce7 100644
--- a/AMBuildScript
+++ b/AMBuildScript
@@ -171,7 +171,7 @@ class SMConfig(object):
     import re
     with open(os.path.join(builder.sourcePath, 'product.version'), 'r') as fp:
       productContents = fp.read()
-    m = re.match('(\d+)\.(\d+)\.(\d+).*', productContents)
+    m = re.match(r'(\d+)\.(\d+)\.(\d+).*', productContents)
     if m == None:
       self.productVersion = '1.0.0'
     else: