Index: clang/include/clang/Driver/Options.td
===================================================================
--- clang/include/clang/Driver/Options.td
+++ clang/include/clang/Driver/Options.td
@@ -3338,11 +3338,12 @@
 def mglobal_merge : Flag<["-"], "mglobal-merge">, Group<m_Group>, Flags<[CC1Option]>,
   HelpText<"Enable merging of globals">;
 def mhard_float : Flag<["-"], "mhard-float">, Group<m_Group>;
-def miphoneos_version_min_EQ : Joined<["-"], "miphoneos-version-min=">, Group<m_Group>;
 def mios_version_min_EQ : Joined<["-"], "mios-version-min=">,
-  Alias<miphoneos_version_min_EQ>, HelpText<"Set iOS deployment target">;
+  Group<m_Group>, HelpText<"Set iOS deployment target">;
+def : Joined<["-"], "miphoneos-version-min=">,
+  Group<m_Group>, Alias<mios_version_min_EQ>;
 def mios_simulator_version_min_EQ : Joined<["-"], "mios-simulator-version-min=">;
-def miphonesimulator_version_min_EQ : Joined<["-"], "miphonesimulator-version-min=">, Alias<mios_simulator_version_min_EQ>;
+def : Joined<["-"], "miphonesimulator-version-min=">, Alias<mios_simulator_version_min_EQ>;
 def mkernel : Flag<["-"], "mkernel">, Group<m_Group>;
 def mlinker_version_EQ : Joined<["-"], "mlinker-version=">,
   Flags<[NoXarchOption]>;
Index: clang/lib/Driver/ToolChains/Darwin.cpp
===================================================================
--- clang/lib/Driver/ToolChains/Darwin.cpp
+++ clang/lib/Driver/ToolChains/Darwin.cpp
@@ -1554,7 +1554,7 @@
       Opt = options::OPT_mmacos_version_min_EQ;
       break;
     case DarwinPlatformKind::IPhoneOS:
-      Opt = options::OPT_miphoneos_version_min_EQ;
+      Opt = options::OPT_mios_version_min_EQ;
       break;
     case DarwinPlatformKind::TvOS:
       Opt = options::OPT_mtvos_version_min_EQ;
@@ -1728,7 +1728,7 @@
 getDeploymentTargetFromOSVersionArg(DerivedArgList &Args,
                                     const Driver &TheDriver) {
   Arg *macOSVersion = Args.getLastArg(options::OPT_mmacos_version_min_EQ);
-  Arg *iOSVersion = Args.getLastArg(options::OPT_miphoneos_version_min_EQ,
+  Arg *iOSVersion = Args.getLastArg(options::OPT_mios_version_min_EQ,
                                     options::OPT_mios_simulator_version_min_EQ);
   Arg *TvOSVersion =
       Args.getLastArg(options::OPT_mtvos_version_min_EQ,