diff --git a/hardware/cores/arduino/WMath.cpp b/hardware/cores/arduino/WMath.cpp
index 294d0dd19..2120c4cc1 100644
--- a/hardware/cores/arduino/WMath.cpp
+++ b/hardware/cores/arduino/WMath.cpp
@@ -55,3 +55,6 @@ long map(long x, long in_min, long in_max, long out_min, long out_max)
 {
   return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
 }
+
+unsigned int makeWord(unsigned int w) { return w; }
+unsigned int makeWord(unsigned char h, unsigned char l) { return (h << 8) | l; }
\ No newline at end of file
diff --git a/hardware/cores/arduino/WProgram.h b/hardware/cores/arduino/WProgram.h
index e20cab56e..fc14923e8 100755
--- a/hardware/cores/arduino/WProgram.h
+++ b/hardware/cores/arduino/WProgram.h
@@ -12,8 +12,8 @@
 #ifdef __cplusplus
 #include "HardwareSerial.h"
 
-uint16_t makeWord(uint16_t w) { return w; }
-uint16_t makeWord(byte h, byte l) { return (h << 8) | l; }
+uint16_t makeWord(uint16_t w);
+uint16_t makeWord(byte h, byte l);
 
 #define word(...) makeWord(__VA_ARGS__)