| Index: runtime/bin/io_service_no_ssl.h
 | 
| diff --git a/runtime/bin/io_service_no_ssl.h b/runtime/bin/io_service_no_ssl.h
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| index db2af1c951df083176b2b68b292401cc531a9231..b8cb5451cfa300c96ed780e0162be4b3464facda 100644
 | 
| --- a/runtime/bin/io_service_no_ssl.h
 | 
| +++ b/runtime/bin/io_service_no_ssl.h
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| @@ -5,6 +5,10 @@
 | 
|  #ifndef BIN_IO_SERVICE_NO_SSL_H_
 | 
|  #define BIN_IO_SERVICE_NO_SSL_H_
 | 
|  
 | 
| +#if defined(DART_IO_DISABLED) || !defined(DART_IO_SECURE_SOCKET_DISABLED)
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| +#error "io_service_no_ssl.h can only be included on builds with IO enabled"
 | 
| +#endif
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| +
 | 
|  #include "bin/builtin.h"
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|  #include "bin/utils.h"
 | 
|  
 | 
| 
 |