diff --git a/lib/util/escape.js b/lib/util/escape.js
index e4804b9..7bf2905 100644
--- a/lib/util/escape.js
+++ b/lib/util/escape.js
@@ -20,12 +20,12 @@ function escapeArgument(arg, doubleEscapeMetaChars) {
 
     // Sequence of backslashes followed by a double quote:
     // double up all the backslashes and escape the double quote
-    arg = arg.replace(/(?=\\*?)"/g, '$1$1\\"');
+    arg = arg.replace(/(?=(\\+?)?)\1"/g, '$1$1\\"');
 
     // Sequence of backslashes followed by the end of the string
     // (which will become a double quote later):
     // double up all the backslashes
-    arg = arg.replace(/(?=\\*?)$/, '$1$1');
+    arg = arg.replace(/(?=(\\+?)?)\1$/, '$1$1');
 
     // All other backslashes occur literally