diff --git a/client/deps/liblua/luaconf.h b/client/deps/liblua/luaconf.h
index 676f91755..c680f389a 100644
--- a/client/deps/liblua/luaconf.h
+++ b/client/deps/liblua/luaconf.h
@@ -8,6 +8,15 @@
 #ifndef lconfig_h
 #define lconfig_h
 
+#if defined(__APPLE__)
+     #include "TargetConditionals.h"
+     #if TARGET_OS_IOS || TARGET_OS_WATCH || TARGET_OS_TV
+         #define system(s) ((s)==NULL ? 0 : -1)
+     #endif // end iOS
+#elif defined(__ANDROID__)
+     #define system(s) ((s)==NULL ? 0 : -1)
+#endif
+
 #include <limits.h>
 #include <stddef.h>
 
diff --git a/client/src/util_darwin.m b/client/src/util_darwin.m
index f2d45fe56..d5107c2fc 100644
--- a/client/src/util_darwin.m
+++ b/client/src/util_darwin.m
@@ -20,7 +20,12 @@
 
 #import <Foundation/NSString.h>
 #import <Foundation/NSProcessInfo.h>
+
+#if TARGET_OS_IOS
+#import <UIKit/UIKit.h>
+#else
 #import <AppKit/NSApplication.h>
+#endif
 
 static id activity = nil;
 
@@ -49,8 +54,11 @@ void enableAppNap() { }
 #endif
 
 
+#if TARGET_OS_IOS
+void makeUnfocusable() { }
+void makeFocusable() { }
 //OS X Version 10.6 is defined in OS X 10.6 and later
-#if defined(MAC_OS_X_VERSION_10_6)
+#elif defined(MAC_OS_X_VERSION_10_6)
 void makeUnfocusable() {
     [NSApp setActivationPolicy:NSApplicationActivationPolicyProhibited];
 }