diff --git a/src/include/cross/ios.aarch64 b/src/include/cross/ios.aarch64
index d4fff14d5c..3b6c4c5cdf 100644
--- a/src/include/cross/ios.aarch64
+++ b/src/include/cross/ios.aarch64
@@ -162,7 +162,7 @@
 #define HAVE_FCNTL_H 1
 
 /* Define to 1 if you have the `fdatasync' function. */
-#define HAVE_FDATASYNC 1
+/* #undef HAVE_FDATASYNC */
 
 /* Define to 1 if you have the `fegetenv' function. */
 #define HAVE_FEGETENV 1
@@ -590,7 +590,7 @@
 #define STDC_HEADERS 1
 
 /* Define this if databases on raw devices should be supported */
-#define SUPPORT_RAW_DEVICES 1
+/* #undef SUPPORT_RAW_DEVICES */
 
 /* Define to 1 if you can safely include both <sys/time.h> and <time.h>. */
 #define TIME_WITH_SYS_TIME 1
diff --git a/src/isql/isql.epp b/src/isql/isql.epp
index 108ed3fecd..d792273927 100644
--- a/src/isql/isql.epp
+++ b/src/isql/isql.epp
@@ -4235,6 +4235,9 @@ static processing_state copy_table(TEXT* source,
 	{
 		fclose(isqlGlob.Out);
 
+#ifdef IOS
+		STDERROUT("Table copy not supported on iOS");
+#else
 		// easy to make a copy in another database
 		const TEXT* altdb = isqlGlob.global_Db_name;
 		if (*otherdb)
@@ -4246,6 +4249,7 @@ static processing_state copy_table(TEXT* source,
 			IUTILS_msg_get(COPY_ERR, errbuf, SafeArg() << destination << altdb);
 			STDERROUT(errbuf);
 		}
+#endif
 	}
 
 	unlink(ftmp.c_str());
@@ -5022,6 +5026,9 @@ static processing_state escape(const TEXT* cmd)
 	if (!*shellcmd)
 		shellcmd = emptyCmd;
 
+#ifdef IOS
+	return FAIL;
+#else
 	const int rc = system(shellcmd);
 
 #ifdef WIN_NT
@@ -5032,6 +5039,7 @@ static processing_state escape(const TEXT* cmd)
 #endif
 
 	return rc ? FAIL : SKIP;
+#endif // IOS
 }
 
 
diff --git a/src/jrd/replication/Utils.cpp b/src/jrd/replication/Utils.cpp
index 7f9ff6fe85..8595c42c94 100644
--- a/src/jrd/replication/Utils.cpp
+++ b/src/jrd/replication/Utils.cpp
@@ -251,6 +251,9 @@ namespace Replication
 		DWORD exitCode = 0;
 		GetExitCodeProcess(seInfo.hProcess, &exitCode);
 		return (int) exitCode;
+#elif defined(IOS)
+		errno = EPERM;
+		return -1;
 #else
 		return system(command.c_str());
 #endif