diff --git a/rover/src/hono_interaction/hono_interaction.h b/rover/src/hono_interaction/hono_interaction.h
index 8126977..47c86a9 100644
--- a/rover/src/hono_interaction/hono_interaction.h
+++ b/rover/src/hono_interaction/hono_interaction.h
@@ -27,7 +27,7 @@
 //Interfaces
 
 int registerEntriesToHonoInstance (void);
-int registerDeviceToHonoInstance (char * host_name, int port, char * tenant_name, int device_id);
+int registerDeviceToHonoInstance (char * host_name, int port, char * tenant_name, char * device_id);
 int sendTelemetryDataToHonoInstance (char * host_name, int port, char * tenant_name, char * device_id, char * field, double value);
 int sendEventDataToHonoInstance (char * host_name, int port, char * tenant_name, char * device_id, char * field, double value);