diff --git a/programs/wscript/host.c b/programs/wscript/host.c
index fb95c0c94dd..fb1c86fc620 100644
--- a/programs/wscript/host.c
+++ b/programs/wscript/host.c
@@ -84,7 +84,7 @@ static void print_string(const WCHAR *string)
     ret = WriteConsoleW(GetStdHandle(STD_OUTPUT_HANDLE), string, len, &count, NULL);
     if(ret) {
         static const WCHAR crnlW[] = {'\r','\n'};
-        WriteConsoleW(GetStdHandle(STD_OUTPUT_HANDLE), crnlW, sizeof(crnlW)/sizeof(*crnlW), &count, NULL);
+        WriteConsoleW(GetStdHandle(STD_OUTPUT_HANDLE), crnlW, ARRAY_SIZE(crnlW), &count, NULL);
         return;
     }
 
@@ -183,7 +183,7 @@ static HRESULT WINAPI Host_get_FullName(IHost *iface, BSTR *out_Path)
 
     WINE_TRACE("(%p)\n", out_Path);
 
-    if(GetModuleFileNameW(NULL, fullPath, sizeof(fullPath)/sizeof(WCHAR)) == 0)
+    if(GetModuleFileNameW(NULL, fullPath, ARRAY_SIZE(fullPath)) == 0)
         return E_FAIL;
     if(!(*out_Path = SysAllocString(fullPath)))
         return E_OUTOFMEMORY;
@@ -198,7 +198,7 @@ static HRESULT WINAPI Host_get_Path(IHost *iface, BSTR *out_Path)
 
     WINE_TRACE("(%p)\n", out_Path);
 
-    if(GetModuleFileNameW(NULL, path, sizeof(path)/sizeof(WCHAR)) == 0)
+    if(GetModuleFileNameW(NULL, path, ARRAY_SIZE(path)) == 0)
         return E_FAIL;
     pos = strrchrW(path, '\\');
     howMany = pos - path;
diff --git a/programs/wscript/main.c b/programs/wscript/main.c
index 3537f9d7241..1cbb9e7e982 100644
--- a/programs/wscript/main.c
+++ b/programs/wscript/main.c
@@ -253,7 +253,7 @@ static BOOL get_engine_clsid(const WCHAR *ext, CLSID *clsid)
     if(res != ERROR_SUCCESS)
         return FALSE;
 
-    size = sizeof(fileid)/sizeof(WCHAR);
+    size = ARRAY_SIZE(fileid);
     res = RegQueryValueW(hkey, NULL, fileid, &size);
     RegCloseKey(hkey);
     if(res != ERROR_SUCCESS)
@@ -266,7 +266,7 @@ static BOOL get_engine_clsid(const WCHAR *ext, CLSID *clsid)
     if(res != ERROR_SUCCESS)
         return FALSE;
 
-    size = sizeof(progid)/sizeof(WCHAR);
+    size = ARRAY_SIZE(progid);
     res = RegQueryValueW(hkey, NULL, progid, &size);
     RegCloseKey(hkey);
     if(res != ERROR_SUCCESS)
@@ -446,8 +446,8 @@ int WINAPI wWinMain(HINSTANCE hInst, HINSTANCE hPrevInst, LPWSTR cmdline, int cm
         WINE_FIXME("No file name specified\n");
         return 1;
     }
-    res = GetFullPathNameW(filename, sizeof(scriptFullName)/sizeof(WCHAR), scriptFullName, &filepart);
-    if(!res || res > sizeof(scriptFullName)/sizeof(WCHAR))
+    res = GetFullPathNameW(filename, ARRAY_SIZE(scriptFullName), scriptFullName, &filepart);
+    if(!res || res > ARRAY_SIZE(scriptFullName))
         return 1;
 
     ext = strrchrW(filepart, '.');