diff --git a/src/lib/javacompat.cpp b/src/lib/javacompat.cpp
index 5a04b22..5d9ca08 100644
--- a/src/lib/javacompat.cpp
+++ b/src/lib/javacompat.cpp
@@ -65,7 +65,7 @@ namespace JavaCompat {
         //placeholder size bytes
         output.push_back(0x00);
         output.push_back(0x00);
-        for(int i=0; i<stdString.size(); i++){
+        for(uint16_t i=0; i<stdString.size(); i++){
             if((uint8_t) stdString[i] == 0x00){
                 *size += 1;
                 output.push_back(0xc0);
@@ -87,7 +87,6 @@ namespace JavaCompat {
             #endif
         #endif
 
-        
         return ErrorOr(output);
     }