| Index: runtime/bin/BUILD.gn
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| diff --git a/runtime/bin/BUILD.gn b/runtime/bin/BUILD.gn
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| index 04d7097e1f3d69d0e4162ec3bc82177fad0d1e7d..20b2a8a84a0a9d4e058c9a82e5da82fa00fbb6d4 100644
 | 
| --- a/runtime/bin/BUILD.gn
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| +++ b/runtime/bin/BUILD.gn
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| @@ -280,7 +280,13 @@ source_set("embedded_dart_io") {
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|    }
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|    set_sources_assignment_filter(custom_sources_filter)
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|  
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| -  defines = [ "DART_IO_SECURE_SOCKET_DISABLED" ]
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| +  if (is_mac || is_ios) {
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| +    libs = [
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| +      "Security.framework",
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| +    ]
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| +  } else {
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| +    defines = [ "DART_IO_SECURE_SOCKET_DISABLED" ]
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| +  }
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|  
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|    sources = io_impl_sources_gypi.sources + builtin_impl_sources_gypi.sources
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|    sources += [
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| 
 |