diff --git a/userspace/libscap/scap.h b/userspace/libscap/scap.h
index 47eaae9772..b3c752f5c9 100644
--- a/userspace/libscap/scap.h
+++ b/userspace/libscap/scap.h
@@ -872,7 +872,7 @@ int32_t scap_disable_dynamic_snaplen(scap_t* handle);
 uint64_t scap_ftell(scap_t *handle);
 void scap_fseek(scap_t *handle, uint64_t off);
 int32_t scap_enable_tracers_capture(scap_t* handle);
-int32_t scap_fd_add(scap_threadinfo* tinfo, uint64_t fd, scap_fdinfo* fdinfo);
+int32_t scap_fd_add(scap_threadinfo* tinfo, scap_fdinfo* fdinfo);
 
 int32_t scap_get_n_tracepoint_hit(scap_t* handle, long* ret);
 int32_t scap_set_fullcapture_port_range(scap_t* handle, uint16_t range_start, uint16_t range_end);
diff --git a/userspace/libscap/scap_procs.c b/userspace/libscap/scap_procs.c
index 119371f394..05cacec9fc 100644
--- a/userspace/libscap/scap_procs.c
+++ b/userspace/libscap/scap_procs.c
@@ -60,7 +60,7 @@ void scap_proc_free_table(struct scap_proclist* proclist)
 	}
 }
 
-int32_t scap_fd_add(scap_threadinfo* tinfo, uint64_t fd, scap_fdinfo* fdinfo)
+int32_t scap_fd_add(scap_threadinfo* tinfo, scap_fdinfo* fdinfo)
 {
 	int32_t uth_status = SCAP_SUCCESS;
 
diff --git a/userspace/libsinsp/threadinfo.cpp b/userspace/libsinsp/threadinfo.cpp
index cfc0949d14..753c3c9b12 100644
--- a/userspace/libsinsp/threadinfo.cpp
+++ b/userspace/libsinsp/threadinfo.cpp
@@ -2041,7 +2041,7 @@ void sinsp_thread_manager::dump_threads_to_file(scap_dumper_t* dumper)
 				//
 				// Add the new fd to the scap table.
 				//
-				if(scap_fd_add(&sctinfo, it->first, scfdinfo) != SCAP_SUCCESS)
+				if(scap_fd_add(&sctinfo, scfdinfo) != SCAP_SUCCESS)
 				{
 					throw sinsp_exception("Failed to add fd to hash table");
 				}