diff --git a/i2c_smbus/i2c_smbus_amdadl.cpp b/i2c_smbus/i2c_smbus_amdadl.cpp
index 28ee564c..ffa574da 100644
--- a/i2c_smbus/i2c_smbus_amdadl.cpp
+++ b/i2c_smbus/i2c_smbus_amdadl.cpp
@@ -164,12 +164,12 @@ s32 i2c_smbus_amdadl::i2c_smbus_xfer(u8 addr, char read_write, u8 command, int s
 
     case I2C_SMBUS_BYTE_DATA:
         data_size = 1;
-        data_ptr = data;
+        data_ptr = (char*)data;
         break;
 
     case I2C_SMBUS_WORD_DATA:
         data_size = 2;
-        data_ptr = data;
+        data_ptr = (char*)data;
         break;
 
     case I2C_SMBUS_BLOCK_DATA: