diff --git a/compress/opacify.pl b/compress/opacify.pl
index d17c914..8c9a9a2 100755
--- a/compress/opacify.pl
+++ b/compress/opacify.pl
@@ -17,7 +17,7 @@ $script =~ s=/\*([^\*]|\*+[^\/])*\*/==g;
 $script =~ s=//.*==g;
 
 # stringify property names
-$script =~ s=\.([a-zA-Z0-9][_a-zA-Z0-9]*)=['$1']=g;
+$script =~ s=\.([a-zA-Z][_a-zA-Z0-9]*)=['$1']=g;
 
 # stringify sjcl
 $script =~ s=(?:var\s+)?sjcl(\.|\s*\=)=window['sjcl']$1=g;