diff --git a/dlls/secur32/schannel.c b/dlls/secur32/schannel.c
index 6d50c97fab0..b31eb857df3 100644
--- a/dlls/secur32/schannel.c
+++ b/dlls/secur32/schannel.c
@@ -932,6 +932,8 @@ static SECURITY_STATUS SEC_ENTRY schan_InitializeSecurityContextW(
         *pfContextAttr |= ISC_RET_ALLOCATED_MEMORY;
     if (ctx->req_ctx_attr & ISC_REQ_STREAM)
         *pfContextAttr |= ISC_RET_STREAM;
+    if (ctx->req_ctx_attr & ISC_REQ_USE_SUPPLIED_CREDS)
+        *pfContextAttr |= ISC_RET_USED_SUPPLIED_CREDS;
 
     return ret;
 }
diff --git a/dlls/secur32/tests/schannel.c b/dlls/secur32/tests/schannel.c
index ebdfcb61a13..6ae76eab1a5 100644
--- a/dlls/secur32/tests/schannel.c
+++ b/dlls/secur32/tests/schannel.c
@@ -843,7 +843,7 @@ todo_wine
 
     buffers[1].pBuffers[0].cbBuffer = ret;
     status = InitializeSecurityContextA(&cred_handle, &context, (SEC_CHAR *)"localhost",
-            ISC_REQ_CONFIDENTIALITY|ISC_REQ_STREAM,
+            ISC_REQ_CONFIDENTIALITY|ISC_REQ_STREAM|ISC_REQ_USE_SUPPLIED_CREDS,
             0, 0, &buffers[1], 0, NULL, &buffers[0], &attrs, NULL);
     buffers[1].pBuffers[0].cbBuffer = buf_size;
     while (status == SEC_I_CONTINUE_NEEDED)
@@ -860,7 +860,7 @@ todo_wine
         buf->BufferType = SECBUFFER_TOKEN;
 
         status = InitializeSecurityContextA(&cred_handle, &context, (SEC_CHAR *)"localhost",
-            ISC_REQ_CONFIDENTIALITY|ISC_REQ_STREAM,
+            ISC_REQ_CONFIDENTIALITY|ISC_REQ_STREAM|ISC_REQ_USE_SUPPLIED_CREDS,
             0, 0, &buffers[1], 0, NULL, &buffers[0], &attrs, NULL);
         buffers[1].pBuffers[0].cbBuffer = buf_size;
     }
@@ -871,6 +871,7 @@ todo_wine
         skip("Handshake failed\n");
         return;
     }
+    ok(attrs & (ISC_RET_CONFIDENTIALITY|ISC_RET_STREAM|ISC_RET_USED_SUPPLIED_CREDS), "got %08x\n", attrs);
 
     status = QueryCredentialsAttributesA(&cred_handle, SECPKG_CRED_ATTR_NAMES, &names);
     ok(status == SEC_E_NO_CREDENTIALS || status == SEC_E_UNSUPPORTED_FUNCTION /* before Vista */, "expected SEC_E_NO_CREDENTIALS, got %08x\n", status);