diff --git a/reactos/include/ndk/psfuncs.h b/reactos/include/ndk/psfuncs.h
index d0439120a79..40d200f16c3 100644
--- a/reactos/include/ndk/psfuncs.h
+++ b/reactos/include/ndk/psfuncs.h
@@ -199,7 +199,8 @@ PsGetProcessExitStatus(
     _In_ PEPROCESS Process
 );
 
-HANDLE
+NTKERNELAPI
+ULONG
 NTAPI
 PsGetProcessSessionId(
     _In_ PEPROCESS Process
diff --git a/reactos/ntoskrnl/ps/process.c b/reactos/ntoskrnl/ps/process.c
index 1f881e65826..48e5054e616 100644
--- a/reactos/ntoskrnl/ps/process.c
+++ b/reactos/ntoskrnl/ps/process.c
@@ -1147,11 +1147,11 @@ PsGetProcessSecurityPort(PEPROCESS Process)
 /*
  * @implemented
  */
-HANDLE
+ULONG
 NTAPI
 PsGetProcessSessionId(PEPROCESS Process)
 {
-    return (HANDLE)Process->Session;
+    return MmGetSessionId(Process);
 }
 
 /*