diff --git a/src/emerge.cpp b/src/emerge.cpp
index 2d8b01819..b31a942e3 100644
--- a/src/emerge.cpp
+++ b/src/emerge.cpp
@@ -349,7 +349,7 @@ bool EmergeThread::getBlockOrStartGen(v3s16 p, MapBlock **b,
 
 void *EmergeThread::Thread() {
 	ThreadStarted();
-	log_register_thread("EmergeThread" + id);
+	log_register_thread("EmergeThread" + itos(id));
 	DSTACK(__FUNCTION_NAME);
 	BEGIN_DEBUG_EXCEPTION_HANDLER