diff --git a/src/Cleave.js b/src/Cleave.js
index fc84440c..37f3412d 100644
--- a/src/Cleave.js
+++ b/src/Cleave.js
@@ -307,7 +307,7 @@ Cleave.prototype = {
         if (pps.prefix) {
             if (pps.tailPrefix) {
                 value = value + pps.prefix;
-            } else if(value !== pps.prefix) {
+            } else {
                 value = pps.prefix + value;
             }
 
diff --git a/src/Cleave.react.js b/src/Cleave.react.js
index ca9b3fac..58d468dc 100644
--- a/src/Cleave.react.js
+++ b/src/Cleave.react.js
@@ -359,7 +359,7 @@ var cleaveReactClass = CreateReactClass({
         if (pps.prefix) {
             if (pps.tailPrefix) {
                 value = value + pps.prefix;
-            } else if (value !== pps.prefix) {
+            } else {
                 value = pps.prefix + value;
             }