diff --git a/src/MPU9250_asukiaaa.cpp b/src/MPU9250_asukiaaa.cpp
index 280b979..2efea7b 100644
--- a/src/MPU9250_asukiaaa.cpp
+++ b/src/MPU9250_asukiaaa.cpp
@@ -39,6 +39,16 @@ uint8_t MPU9250_asukiaaa::i2cWriteByte(uint8_t Address, uint8_t Register, uint8_
   return myWire->endTransmission();
 }
 
+MPU9250_asukiaaa::MPU9250_asukiaaa(uint8_t address):
+  address(address) {
+  accelRange = 0;
+  gyroRange  = 0;
+  magXOffset = 0;
+  magYOffset = 0;
+  magZOffset = 0;
+  myWire = NULL;
+}
+
 void MPU9250_asukiaaa::setWire(TwoWire* wire) {
   myWire = wire;
 }
diff --git a/src/MPU9250_asukiaaa.h b/src/MPU9250_asukiaaa.h
index 3f60663..cf1bac2 100644
--- a/src/MPU9250_asukiaaa.h
+++ b/src/MPU9250_asukiaaa.h
@@ -35,15 +35,7 @@ class MPU9250_asukiaaa {
   uint8_t gyroBuff[MPU9250_BUFF_LEN_GYRO];
   uint8_t magBuff[MPU9250_BUFF_LEN_MAG];
 
-  MPU9250_asukiaaa(uint8_t address = MPU9250_ADDRESS_AD0_LOW) {
-    this->address = address;
-    accelRange = 0;
-    gyroRange  = 0;
-    magXOffset = 0;
-    magYOffset = 0;
-    magZOffset = 0;
-    myWire = NULL;
-  }
+  MPU9250_asukiaaa(uint8_t address = MPU9250_ADDRESS_AD0_LOW);
   void setWire(TwoWire *wire);
   uint8_t readId(uint8_t *id);