diff --git a/src/drivers/si7210/CMakeLists.txt b/src/drivers/si7210/CMakeLists.txt
index 578508b628..f4b744d51d 100644
--- a/src/drivers/si7210/CMakeLists.txt
+++ b/src/drivers/si7210/CMakeLists.txt
@@ -34,7 +34,6 @@ px4_add_module(
 	MODULE drivers__si7210
 	MAIN si7210
 	COMPILE_FLAGS
-		# -DDEBUG_BUILD
 	SRCS
 		si7210_main.cpp
 		si7210.cpp
diff --git a/src/drivers/si7210/si7210.cpp b/src/drivers/si7210/si7210.cpp
index 1ce7979ee7..15f7284901 100644
--- a/src/drivers/si7210/si7210.cpp
+++ b/src/drivers/si7210/si7210.cpp
@@ -207,7 +207,6 @@ int SI7210::collect()
 	perf_begin(_sample_perf);
 
 	_collect_phase = false;
-	// bool si7210_notify = true;
 
 	uint8_t     reg;
 
@@ -325,25 +324,3 @@ SI7210::RunImpl()
 		break;
 	}
 }
-
-bool SI7210::crc(const uint8_t data[], unsigned size, uint8_t checksum)
-{
-	uint8_t crc_value = 0xff;
-
-	// calculate 8-bit checksum with polynomial 0x31 (x^8 + x^5 + x^4 + 1)
-	for (unsigned i = 0; i < size; i++) {
-		crc_value ^= (data[i]);
-
-		for (int bit = 8; bit > 0; --bit) {
-			if (crc_value & 0x80) {
-				crc_value = (crc_value << 1) ^ 0x31;
-
-			} else {
-				crc_value = (crc_value << 1);
-			}
-		}
-	}
-
-	// verify checksum
-	return (crc_value == checksum);
-}
diff --git a/src/drivers/si7210/si7210.h b/src/drivers/si7210/si7210.h
index 5eee584abc..d3d81bb73d 100644
--- a/src/drivers/si7210/si7210.h
+++ b/src/drivers/si7210/si7210.h
@@ -173,11 +173,6 @@ private:
 	 */
 	int				get_sensor_data(uint8_t otpAddr, int8_t *data);
 
-	/**
-	 * Calculate the CRC8 for the sensor payload data
-	 */
-	bool crc(const uint8_t data[], unsigned size, uint8_t checksum);
-
 	/**
 	 * Write a command in Sensirion specific logic
 	 */