diff --git a/dlls/shlwapi/ordinal.c b/dlls/shlwapi/ordinal.c
index c0492b7d374..e2d396d0567 100644
--- a/dlls/shlwapi/ordinal.c
+++ b/dlls/shlwapi/ordinal.c
@@ -443,6 +443,8 @@ INT WINAPI SHLWAPI_218(UINT CodePage, LPCWSTR lpSrcStr, LPSTR lpDstStr,
 /*************************************************************************
  *      @	[SHLWAPI.217]
  *
+ * Hmm, some program used lpnMultiCharCount == 0x3 (and lpSrcStr was "C")
+ * --> Crash. Something wrong here.
  */
 INT WINAPI SHLWAPI_217(LPCWSTR lpSrcStr, LPSTR lpDstStr, LPINT lpnMultiCharCount)
 {
diff --git a/dlls/shlwapi/shlwapi.spec b/dlls/shlwapi/shlwapi.spec
index cd4180dfc2a..9aa7e3e2822 100644
--- a/dlls/shlwapi/shlwapi.spec
+++ b/dlls/shlwapi/shlwapi.spec
@@ -226,8 +226,8 @@ debug_channels (shell)
 214 stub @
 215 stdcall @(long long long) SHLWAPI_215
 216 stub @
-217 stdcall @(wstr str ptr) SHLWAPI_217
-218 stdcall @(long wstr str ptr) SHLWAPI_218
+217 stdcall @(wstr ptr ptr) SHLWAPI_217
+218 stdcall @(long wstr ptr ptr) SHLWAPI_218
 219 stdcall @(long long long long) SHLWAPI_219
 220 stub @
 221 stub @