diff --git a/wiringPi/odroidc2.c b/wiringPi/odroidc2.c
index 71debd6..f7e592d 100644
--- a/wiringPi/odroidc2.c
+++ b/wiringPi/odroidc2.c
@@ -139,7 +139,7 @@ static const int phyToGpio_rev2[64] = {
 /*----------------------------------------------------------------------------*/
 // wiringPi Pinmap control arrary
 /*----------------------------------------------------------------------------*/
-const int *pinToGpio, *phyToGpio;
+extern const int *pinToGpio, *phyToGpio;
 
 /* ADC file descriptor */
 static int adcFds[2];
diff --git a/wiringPiD/drcNetCmd.h b/wiringPiD/drcNetCmd.h
index 23f7dc1..3cbd639 100644
--- a/wiringPiD/drcNetCmd.h
+++ b/wiringPiD/drcNetCmd.h
@@ -35,7 +35,7 @@
 #define	DRCN_ANALOG_READ	9
 
 
-struct drcNetComStruct
+extern struct drcNetComStruct
 {
   uint32_t pin ;
   uint32_t cmd ;