diff --git a/dll/win32/imm32/imm.c b/dll/win32/imm32/imm.c
index afa504c4c91..a493202a6aa 100644
--- a/dll/win32/imm32/imm.c
+++ b/dll/win32/imm32/imm.c
@@ -3207,8 +3207,8 @@ BOOL WINAPI ImmDisableLegacyIME(void)
     FIXME("stub\n");
     return TRUE;
 }
-#ifdef __REACTOS__
 
+#ifdef __REACTOS__
 /***********************************************************************
  *              ImmSetActiveContext(IMM32.@)
  */
@@ -3231,4 +3231,15 @@ BOOL WINAPI ImmSetActiveContextConsoleIME(HWND hwnd, BOOL fFlag)
         return ImmSetActiveContext(hwnd, hIMC, fFlag);
     return FALSE;
 }
+
+/***********************************************************************
+*		ImmRegisterClient(IMM32.@)
+*       ( Undocumented, called from user32.dll )
+*/
+BOOL WINAPI ImmRegisterClient(PVOID ptr, /* FIXME: should point to SHAREDINFO structure */
+                              HINSTANCE hMod)
+{
+    FIXME("Stub\n");
+    return TRUE;
+}
 #endif
diff --git a/dll/win32/imm32/imm32.spec b/dll/win32/imm32/imm32.spec
index bfd54c3e579..1d6a8174ca3 100644
--- a/dll/win32/imm32/imm32.spec
+++ b/dll/win32/imm32/imm32.spec
@@ -77,7 +77,7 @@
 @ stdcall ImmProcessKey(long long long long long)
 @ stub ImmPutImeMenuItemsIntoMappedFile
 @ stdcall ImmReSizeIMCC(long long)
-@ stub ImmRegisterClient
+@ stdcall ImmRegisterClient(ptr ptr)
 @ stdcall ImmRegisterWordA(long str long str)
 @ stdcall ImmRegisterWordW(long wstr long wstr)
 @ stdcall ImmReleaseContext(long long)