diff --git a/crates/tauri-utils/src/config.rs b/crates/tauri-utils/src/config.rs
index f5b4c05ae..15da73a78 100644
--- a/crates/tauri-utils/src/config.rs
+++ b/crates/tauri-utils/src/config.rs
@@ -2069,10 +2069,7 @@ fn default_window_label() -> String {
 }
 
 fn default_width() -> Option<f64> {
-  // the config is generated by a proc macro, so we have to check CARGO_CFG_TARGET_OS since proc macros run on the host target
-  if cfg!(any(target_os = "ios", target_os = "android"))
-    || std::env::var("CARGO_CFG_TARGET_OS").map_or(false, |os| os == "ios" || os == "android")
-  {
+  if cfg!(any(target_os = "ios", target_os = "android")) {
     None
   } else {
     Some(800.)
@@ -2080,10 +2077,7 @@ fn default_width() -> Option<f64> {
 }
 
 fn default_height() -> Option<f64> {
-  // the config is generated by a proc macro, so we have to check CARGO_CFG_TARGET_OS since proc macros run on the host target
-  if cfg!(any(target_os = "ios", target_os = "android"))
-    || std::env::var("CARGO_CFG_TARGET_OS").map_or(false, |os| os == "ios" || os == "android")
-  {
+  if cfg!(any(target_os = "ios", target_os = "android")) {
     None
   } else {
     Some(600.)