diff --git a/reactos/base/system/smss/smapiexec.c b/reactos/base/system/smss/smapiexec.c
index 87d7089f7d8..77f08871d2f 100644
--- a/reactos/base/system/smss/smapiexec.c
+++ b/reactos/base/system/smss/smapiexec.c
@@ -265,6 +265,8 @@ SMAPI(SmExecPgm)
 						DPRINT1("SM: %s: SmCreateClient failed (Status=0x%08lx)\n",
 							__FUNCTION__, Status);
 					}
+					NtClose(ProcessInfo.ThreadHandle);
+					NtClose(ProcessInfo.ProcessHandle);
 				}
 			}
 			else
diff --git a/reactos/lib/rtl/thread.c b/reactos/lib/rtl/thread.c
index e862e85323e..aafe0b4fb0f 100644
--- a/reactos/lib/rtl/thread.c
+++ b/reactos/lib/rtl/thread.c
@@ -209,7 +209,10 @@ RtlCreateUserThread(IN HANDLE ProcessHandle,
     else
     {
         /* Return thread data */
-        if (ThreadHandle) *ThreadHandle = Handle;
+        if (ThreadHandle)
+            *ThreadHandle = Handle;
+        else
+            NtClose(Handle);
         if (ClientId) *ClientId = ThreadCid;
     }