diff --git a/dlls/wininet/internet.c b/dlls/wininet/internet.c
index e11fcb77e24..6345a5b8905 100644
--- a/dlls/wininet/internet.c
+++ b/dlls/wininet/internet.c
@@ -2860,9 +2860,9 @@ HINTERNET WINAPI INTERNET_InternetOpenUrlW(LPWININETAPPINFOW hIC, LPCWSTR lpszUr
 
 	if (urlComponents.dwExtraInfoLength) {
 		WCHAR *path_extra;
-		DWORD size = urlComponents.dwUrlPathLength + urlComponents.dwExtraInfoLength + 1;
+		DWORD len = urlComponents.dwUrlPathLength + urlComponents.dwExtraInfoLength + 1;
 
-		if (!(path_extra = HeapAlloc(GetProcessHeap(), 0, size)))
+		if (!(path_extra = HeapAlloc(GetProcessHeap(), 0, len * sizeof(WCHAR))))
 		{
 			InternetCloseHandle(client);
 			break;