diff --git a/dlls/concrt140/concrt140.spec b/dlls/concrt140/concrt140.spec
index b388c2971b0..ebc35bd19e0 100644
--- a/dlls/concrt140/concrt140.spec
+++ b/dlls/concrt140/concrt140.spec
@@ -455,7 +455,7 @@
 @ stub -arch=win64 ?_Start@_Timer@details@Concurrency@@IEAAXXZ
 @ stub -arch=i386 ?_Stop@_Timer@details@Concurrency@@IAEXXZ
 @ stub -arch=win64 ?_Stop@_Timer@details@Concurrency@@IEAAXXZ
-@ stub ?_Trace_agents@Concurrency@@YAXW4Agents_EventType@1@_JZZ
+@ varargs ?_Trace_agents@Concurrency@@YAXW4Agents_EventType@1@_JZZ(long int64) msvcr120.?_Trace_agents@Concurrency@@YAXW4Agents_EventType@1@_JZZ
 @ cdecl -arch=win32 ?_Trace_ppl_function@Concurrency@@YAXABU_GUID@@EW4ConcRT_EventType@1@@Z(ptr long long) msvcr120.?_Trace_ppl_function@Concurrency@@YAXABU_GUID@@EW4ConcRT_EventType@1@@Z
 @ cdecl -arch=win64 ?_Trace_ppl_function@Concurrency@@YAXAEBU_GUID@@EW4ConcRT_EventType@1@@Z(ptr long long) msvcr120.?_Trace_ppl_function@Concurrency@@YAXAEBU_GUID@@EW4ConcRT_EventType@1@@Z
 @ thiscall -arch=i386 ?_TryAcquire@_NonReentrantBlockingLock@details@Concurrency@@QAE_NXZ(ptr) msvcr120.?_TryAcquire@_NonReentrantBlockingLock@details@Concurrency@@QAE_NXZ
diff --git a/dlls/msvcr110/msvcr110.spec b/dlls/msvcr110/msvcr110.spec
index 0e3b0f3d7b2..a6664a5f70a 100644
--- a/dlls/msvcr110/msvcr110.spec
+++ b/dlls/msvcr110/msvcr110.spec
@@ -657,7 +657,7 @@
 @ stub -arch=arm ?_Tidy@exception@std@@AAAXXZ
 @ stub -arch=i386 ?_Tidy@exception@std@@AAEXXZ
 @ stub -arch=win64 ?_Tidy@exception@std@@AEAAXXZ
-@ stub ?_Trace_agents@Concurrency@@YAXW4Agents_EventType@1@_JZZ
+@ varargs ?_Trace_agents@Concurrency@@YAXW4Agents_EventType@1@_JZZ(long int64) _Trace_agents
 @ cdecl -arch=win32 ?_Trace_ppl_function@Concurrency@@YAXABU_GUID@@EW4ConcRT_EventType@1@@Z(ptr long long) Concurrency__Trace_ppl_function
 @ cdecl -arch=win64 ?_Trace_ppl_function@Concurrency@@YAXAEBU_GUID@@EW4ConcRT_EventType@1@@Z(ptr long long) Concurrency__Trace_ppl_function
 @ cdecl -arch=arm ?_TryAcquire@_NonReentrantBlockingLock@details@Concurrency@@QAA_NXZ(ptr) _ReentrantBlockingLock__TryAcquire
diff --git a/dlls/msvcr120/msvcr120.spec b/dlls/msvcr120/msvcr120.spec
index aebb12cf4a4..0748ccf2c6e 100644
--- a/dlls/msvcr120/msvcr120.spec
+++ b/dlls/msvcr120/msvcr120.spec
@@ -639,7 +639,7 @@
 @ stub -arch=arm ?_Tidy@exception@std@@AAAXXZ
 @ stub -arch=i386 ?_Tidy@exception@std@@AAEXXZ
 @ stub -arch=win64 ?_Tidy@exception@std@@AEAAXXZ
-@ stub ?_Trace_agents@Concurrency@@YAXW4Agents_EventType@1@_JZZ
+@ varargs ?_Trace_agents@Concurrency@@YAXW4Agents_EventType@1@_JZZ(long int64) _Trace_agents
 @ cdecl -arch=win32 ?_Trace_ppl_function@Concurrency@@YAXABU_GUID@@EW4ConcRT_EventType@1@@Z(ptr long long) Concurrency__Trace_ppl_function
 @ cdecl -arch=win64 ?_Trace_ppl_function@Concurrency@@YAXAEBU_GUID@@EW4ConcRT_EventType@1@@Z(ptr long long) Concurrency__Trace_ppl_function
 @ cdecl -arch=arm ?_TryAcquire@_NonReentrantBlockingLock@details@Concurrency@@QAA_NXZ(ptr) _ReentrantBlockingLock__TryAcquire
diff --git a/dlls/msvcr120_app/msvcr120_app.spec b/dlls/msvcr120_app/msvcr120_app.spec
index 6ffc3080ddf..c1d2e4bad83 100644
--- a/dlls/msvcr120_app/msvcr120_app.spec
+++ b/dlls/msvcr120_app/msvcr120_app.spec
@@ -635,7 +635,7 @@
 @ stub -arch=arm ?_Tidy@exception@std@@AAAXXZ
 @ stub -arch=i386 ?_Tidy@exception@std@@AAEXXZ
 @ stub -arch=win64 ?_Tidy@exception@std@@AEAAXXZ
-@ stub ?_Trace_agents@Concurrency@@YAXW4Agents_EventType@1@_JZZ
+@ varargs ?_Trace_agents@Concurrency@@YAXW4Agents_EventType@1@_JZZ(long int64) msvcr120.?_Trace_agents@Concurrency@@YAXW4Agents_EventType@1@_JZZ
 @ cdecl -arch=win32 ?_Trace_ppl_function@Concurrency@@YAXABU_GUID@@EW4ConcRT_EventType@1@@Z(ptr long long) msvcr120.?_Trace_ppl_function@Concurrency@@YAXABU_GUID@@EW4ConcRT_EventType@1@@Z
 @ cdecl -arch=win64 ?_Trace_ppl_function@Concurrency@@YAXAEBU_GUID@@EW4ConcRT_EventType@1@@Z(ptr long long) msvcr120.?_Trace_ppl_function@Concurrency@@YAXAEBU_GUID@@EW4ConcRT_EventType@1@@Z
 @ cdecl -arch=arm ?_TryAcquire@_NonReentrantBlockingLock@details@Concurrency@@QAA_NXZ(ptr) msvcr120.?_TryAcquire@_NonReentrantBlockingLock@details@Concurrency@@QAA_NXZ
diff --git a/dlls/msvcrt/misc.c b/dlls/msvcrt/misc.c
index 8f18aa4cc02..c197d69dd23 100644
--- a/dlls/msvcrt/misc.c
+++ b/dlls/msvcrt/misc.c
@@ -561,6 +561,12 @@ LONG CDECL MSVCRT__crtUnhandledException(EXCEPTION_POINTERS *ep)
     SetUnhandledExceptionFilter(NULL);
     return UnhandledExceptionFilter(ep);
 }
+
+/* ?_Trace_agents@Concurrency@@YAXW4Agents_EventType@1@_JZZ */
+void WINAPIV _Trace_agents(/*enum Concurrency::Agents_EventType*/int type, __int64 id, ...)
+{
+    FIXME("(%d %s)\n", type, wine_dbgstr_longlong(id));
+}
 #endif
 
 #if _MSVCR_VER>=120