diff --git a/general/include/INA226.h b/general/include/INA226.h
index f586d36..59c336d 100644
--- a/general/include/INA226.h
+++ b/general/include/INA226.h
@@ -6,6 +6,8 @@
 
 #ifndef INA226_H
 #define INA226_H
+#include <stdint.h>
+#include <math.h>
 
 // REGISTERS
 #define INA226_CONFIGURATION 0x00
@@ -65,10 +67,12 @@ int ina226_configure(ina226_t *ina, uint8_t mode, uint8_t vshct, uint8_t vbusct,
 		     uint8_t avg);
 
 // Resets all registers to default values
-int ina226_reset(ina226_t ina);
+int ina226_reset(ina226_t *ina);
 
 // Reads manufacturer id register
-int ina226_read_manufacturer_id(ina226_t ina, uint16_t *data);
+int ina226_read_manufacturer_id(ina226_t *ina, uint16_t *data);
 
 // Reads die id
-int ina226_read_die_id(ina226_t ina, uint16_t *data);
\ No newline at end of file
+int ina226_read_die_id(ina226_t *ina, uint16_t *data);
+
+#endif //INA226_H
\ No newline at end of file
diff --git a/general/src/INA226.c b/general/src/INA226.c
index 16a98a3..0a440d1 100644
--- a/general/src/INA226.c
+++ b/general/src/INA226.c
@@ -108,14 +108,14 @@ int ina226_configure(ina226_t *ina, uint8_t mode, uint8_t vshct, uint8_t vbusct,
 }
 
 // Resets all registers to default values
-int ina226_reset(ina226_t ina)
+int ina226_reset(ina226_t *ina)
 {
 	uint16_t reset = INA226_CONFIG_RESET_MASK;
 	return ina226_write_reg(ina, INA226_CONFIGURATION, &reset);
 }
 
 // Reads manufacturer id register
-int ina226_read_manufacturer_id(ina226_t ina, uint16_t *data)
+int ina226_read_manufacturer_id(ina226_t *ina, uint16_t *data)
 {
 	uint16_t manufacturer_id;
 
@@ -131,7 +131,7 @@ int ina226_read_manufacturer_id(ina226_t ina, uint16_t *data)
 }
 
 // Reads die id
-int ina226_read_die_id(ina226_t ina, uint16_t *data)
+int ina226_read_die_id(ina226_t *ina, uint16_t *data)
 {
 	uint16_t die_id;