diff --git a/cores/arduino/Print.cpp b/cores/arduino/Print.cpp
index 5a092af..d829904 100644
--- a/cores/arduino/Print.cpp
+++ b/cores/arduino/Print.cpp
@@ -257,7 +257,7 @@ size_t Print::printFloat(double number, uint8_t digits)
   while (digits-- > 0)
   {
     remainder *= 10.0;
-    int toPrint = int(remainder);
+    unsigned toPrint = unsigned(remainder);
     n += print(toPrint);
     remainder -= toPrint; 
   }