diff --git a/dll/win32/shell32/brfolder.cpp b/dll/win32/shell32/brfolder.cpp
index c49c7fed3e1..a8ca8a86470 100644
--- a/dll/win32/shell32/brfolder.cpp
+++ b/dll/win32/shell32/brfolder.cpp
@@ -15,7 +15,7 @@
 
 WINE_DEFAULT_DEBUG_CHANNEL(shell);
 
-INT WINAPI Shell_GetCachedImageIndexW(LPCWSTR szPath, INT nIndex, UINT Flags);
+EXTERN_C INT WINAPI Shell_GetCachedImageIndexW(LPCWSTR szPath, INT nIndex, UINT Flags);
 
 #define SHV_CHANGE_NOTIFY (WM_USER + 0x1111)
 enum { SHGDN_TREE = SHGDN_NORMAL | SHGDN_INFOLDER };
diff --git a/dll/win32/shell32/iconcache.cpp b/dll/win32/shell32/iconcache.cpp
index e0d8b179ecb..5ebda12f619 100644
--- a/dll/win32/shell32/iconcache.cpp
+++ b/dll/win32/shell32/iconcache.cpp
@@ -828,7 +828,7 @@ INT WINAPI Shell_GetCachedImageIndexA(LPCSTR szPath, INT nIndex, UINT bSimulateD
     return ret;
 }
 
-INT WINAPI Shell_GetCachedImageIndexW(LPCWSTR szPath, INT nIndex, UINT bSimulateDoc)
+EXTERN_C INT WINAPI Shell_GetCachedImageIndexW(LPCWSTR szPath, INT nIndex, UINT bSimulateDoc)
 {
     WARN("(%s,%08x,%08x) semi-stub.\n",debugstr_w(szPath), nIndex, bSimulateDoc);