diff --git a/hardware/arduino/avr/cores/arduino/Print.cpp b/hardware/arduino/avr/cores/arduino/Print.cpp
index 652fed094a7..1e4c99a6552 100644
--- a/hardware/arduino/avr/cores/arduino/Print.cpp
+++ b/hardware/arduino/avr/cores/arduino/Print.cpp
@@ -250,7 +250,7 @@ size_t Print::printFloat(double number, uint8_t digits)
 
   // Print the decimal point, but only if there are digits beyond
   if (digits > 0) {
-    n += print("."); 
+    n += print('.'); 
   }
 
   // Extract digits from the remainder one at a time
diff --git a/hardware/arduino/sam/cores/arduino/Print.cpp b/hardware/arduino/sam/cores/arduino/Print.cpp
index 089a02bc46b..881722e8962 100644
--- a/hardware/arduino/sam/cores/arduino/Print.cpp
+++ b/hardware/arduino/sam/cores/arduino/Print.cpp
@@ -242,7 +242,7 @@ size_t Print::printFloat(double number, uint8_t digits)
 
   // Print the decimal point, but only if there are digits beyond
   if (digits > 0) {
-    n += print("."); 
+    n += print('.'); 
   }
 
   // Extract digits from the remainder one at a time