diff --git a/pkg/wakaama/contrib/objects/ipso_sensor_base.c b/pkg/wakaama/contrib/objects/ipso_sensor_base.c
index b73b823f4e372..8e3e6416b4f8e 100644
--- a/pkg/wakaama/contrib/objects/ipso_sensor_base.c
+++ b/pkg/wakaama/contrib/objects/ipso_sensor_base.c
@@ -257,7 +257,7 @@ static uint8_t _read_cb(lwm2m_context_t * context, uint16_t instance_id, int * n
 }
 
 static uint8_t _exec_cb(lwm2m_context_t * context, uint16_t instance_id, uint16_t resource_id,
-                        uint8_t * buffer, int length, lwm2m_object_t * object);
+                        uint8_t * buffer, int length, lwm2m_object_t * object)
 {
     (void)context;
     (void)buffer;