diff --git a/reactos/dll/win32/advapi32/advapi32.spec b/reactos/dll/win32/advapi32/advapi32.spec
index 713ffa58074..171db89cf21 100644
--- a/reactos/dll/win32/advapi32/advapi32.spec
+++ b/reactos/dll/win32/advapi32/advapi32.spec
@@ -186,7 +186,7 @@
 @ stub ElfClearEventLogFileA
 @ stub ElfClearEventLogFileW
 @ stub ElfCloseEventLog
-@ stub ElfDeregisterEventSource
+@ stdcall ElfDeregisterEventSource(long)
 @ stub ElfFlushEventLog
 @ stub ElfNumberOfRecords
 @ stub ElfOldestRecord
@@ -197,10 +197,10 @@
 @ stub ElfReadEventLogA
 @ stub ElfReadEventLogW
 @ stub ElfRegisterEventSourceA
-@ stub ElfRegisterEventSourceW
+@ stdcall ElfRegisterEventSourceW(ptr ptr ptr)
 @ stub ElfReportEventA
 @ stub ElfReportEventAndSourceW
-@ stub ElfReportEventW
+@ stdcall ElfReportEventW(long long long long ptr long long ptr ptr ptr ptr ptr)
 @ stdcall EnableTrace(long long long ptr double) ntdll.EtwEnableTrace
 @ stdcall EncryptFileA(str)
 @ stdcall EncryptFileW(wstr)
diff --git a/reactos/dll/win32/advapi32/service/eventlog.c b/reactos/dll/win32/advapi32/service/eventlog.c
index 2b535b7c800..efd18d21bcd 100644
--- a/reactos/dll/win32/advapi32/service/eventlog.c
+++ b/reactos/dll/win32/advapi32/service/eventlog.c
@@ -1231,3 +1231,34 @@ ReportEventW(IN HANDLE hEventLog,
     return TRUE;
 }
 
+BOOL WINAPI
+ElfReportEventW(DWORD param1,
+                DWORD param2,
+                DWORD param3,
+                DWORD param4,
+                DWORD param5,
+                DWORD param6,
+                DWORD param7,
+                DWORD param8,
+                DWORD param9,
+                DWORD param10,
+                DWORD param11,
+                DWORD param12
+)
+{
+return TRUE;
+}
+
+HANDLE WINAPI
+ElfRegisterEventSourceW(DWORD param1,
+                        DWORD param2,
+                        DWORD param3)
+{
+return (HANDLE)1;
+}
+
+BOOL WINAPI
+ElfDeregisterEventSource(IN HANDLE hEventLog)
+{
+return TRUE;
+}
\ No newline at end of file