diff --git a/core/fxcodec/codec/fx_codec_progress.cpp b/core/fxcodec/codec/fx_codec_progress.cpp
index 0f2f561..d93d46d 100644
--- a/core/fxcodec/codec/fx_codec_progress.cpp
+++ b/core/fxcodec/codec/fx_codec_progress.cpp
@@ -22,11 +22,11 @@
 
 namespace {
 
-#if _FX_OS_ == _FX_MACOSX_ || _FX_OS_ == _FX_IOS_
+#if _FX_OS_ == _FX_MACOSX_
 const double kPngGamma = 1.7;
-#else  // _FX_OS_ == _FX_MACOSX_ || _FX_OS_ == _FX_IOS_
+#else  // _FX_OS_ == _FX_MACOSX_
 const double kPngGamma = 2.2;
-#endif  // _FX_OS_ == _FX_MACOSX_ || _FX_OS_ == _FX_IOS_
+#endif  // _FX_OS_ == _FX_MACOSX_
 
 void RGB2BGR(uint8_t* buffer, int width = 1) {
   if (buffer && width > 0) {
diff --git a/core/fxcrt/cfx_datetime.cpp b/core/fxcrt/cfx_datetime.cpp
index c623397..beba365 100644
--- a/core/fxcrt/cfx_datetime.cpp
+++ b/core/fxcrt/cfx_datetime.cpp
@@ -8,7 +8,7 @@
 #include "core/fxcrt/fx_system.h"
 
 #if _FX_OS_ == _FX_LINUX_DESKTOP_ || _FX_OS_ == _FX_ANDROID_ || \
-    _FX_OS_ == _FX_MACOSX_ || _FX_OS_ == _FX_IOS_
+    _FX_OS_ == _FX_MACOSX_
 #include <sys/time.h>
 #include <time.h>
 #endif
diff --git a/fxbarcode/utils.h b/fxbarcode/utils.h
index 6140dd0..ec39928 100644
--- a/fxbarcode/utils.h
+++ b/fxbarcode/utils.h
@@ -21,15 +21,14 @@
 
 #if _FX_OS_ == _FX_WIN32_DESKTOP_ || _FX_OS_ == _FX_WIN64_DESKTOP_
 #include <limits>
-#elif _FX_OS_ == _FX_MACOSX_ || _FX_OS_ == _FX_LINUX_DESKTOP_ || \
-    _FX_OS_ == _FX_IOS_
+#elif _FX_OS_ == _FX_MACOSX_ || _FX_OS_ == _FX_LINUX_DESKTOP_
 #include <limits.h>
 #endif
 
 #if _FX_OS_ == _FX_WIN32_DESKTOP_ || _FX_OS_ == _FX_WIN64_DESKTOP_
 #define FXSYS_isnan(x) _isnan(x)
-#elif _FX_OS_ == _FX_MACOSX_ || _FX_OS_ == _FX_IOS_ || \
-    _FX_OS_ == _FX_LINUX_DESKTOP_ || _FX_OS_ == _FX_ANDROID_
+#elif _FX_OS_ == _FX_MACOSX_ || _FX_OS_ == _FX_LINUX_DESKTOP_ || \
+    _FX_OS_ == _FX_ANDROID_
 #include <cmath>
 #define FXSYS_isnan(x) std::isnan(x)
 #endif
@@ -37,7 +36,7 @@
 #if _FX_OS_ == _FX_WIN32_DESKTOP_ || _FX_OS_ == _FX_WIN64_DESKTOP_
 #define FXSYS_nan() (std::numeric_limits<float>::quiet_NaN())
 #elif _FX_OS_ == _FX_MACOSX_ || _FX_OS_ == _FX_LINUX_DESKTOP_ || \
-    _FX_OS_ == _FX_IOS_ || _FX_OS_ == _FX_ANDROID_
+    _FX_OS_ == _FX_ANDROID_
 #define FXSYS_nan() NAN
 #endif