diff --git a/dlls/snmpapi/main.c b/dlls/snmpapi/main.c
index 9e14a194876..1c4d1fa36cd 100644
--- a/dlls/snmpapi/main.c
+++ b/dlls/snmpapi/main.c
@@ -112,6 +112,8 @@ static void asn_any_free(AsnAny *any)
     any->asnType = ASN_NULL;
 }
 
+static ULONGLONG startTime;
+
 /***********************************************************************
  *		DllMain for SNMPAPI
  */
@@ -127,6 +129,7 @@ BOOL WINAPI DllMain(
         return FALSE;  /* prefer native version */
     case DLL_PROCESS_ATTACH:
         DisableThreadLibraryCalls(hInstDLL);
+        startTime = GetTickCount64();
         break;
     case DLL_PROCESS_DETACH:
         break;
@@ -135,6 +138,21 @@ BOOL WINAPI DllMain(
     return TRUE;
 }
 
+/***********************************************************************
+ *      SnmpSvcGetUptime        (SNMPAPI.@)
+ *
+ * BUGS
+ *  This returns the number of centiseconds since the DLL was loaded,
+ *  rather than the number of centiseconds since the SNMP service was
+ *  started, since there isn't yet any SNMP service in Wine.
+ */
+DWORD WINAPI SnmpSvcGetUptime(void)
+{
+    ULONGLONG now = GetTickCount64();
+
+    return (now - startTime) / 10;
+}
+
 /***********************************************************************
  *      SnmpUtilDbgPrint        (SNMPAPI.@)
  *
diff --git a/dlls/snmpapi/snmpapi.spec b/dlls/snmpapi/snmpapi.spec
index 385ca8ac7a4..208231ecfbe 100644
--- a/dlls/snmpapi/snmpapi.spec
+++ b/dlls/snmpapi/snmpapi.spec
@@ -11,7 +11,7 @@
 @ stub SnmpSvcGenerateTrap
 @ stub SnmpSvcGenerateWarmStartTrap
 @ stub SnmpSvcGetEnterpriseOID
-@ stub SnmpSvcGetUptime
+@ stdcall SnmpSvcGetUptime()
 @ stub SnmpSvcInitUptime
 @ stub SnmpSvcReleaseMessage
 @ stub SnmpSvcReportEvent