diff --git a/libdevcore/Assertions.h b/libdevcore/Assertions.h
index 0151cfc1b..729ffb05d 100644
--- a/libdevcore/Assertions.h
+++ b/libdevcore/Assertions.h
@@ -54,6 +54,4 @@ namespace dev
 	} \
 	while (false)
 
-using errinfo_comment = boost::error_info<struct tag_comment, std::string>;
-
 }
diff --git a/libdevcore/Exceptions.h b/libdevcore/Exceptions.h
index 37cdbed96..4817e9e3e 100644
--- a/libdevcore/Exceptions.h
+++ b/libdevcore/Exceptions.h
@@ -56,9 +56,5 @@ DEV_SIMPLE_EXCEPTION(FileError);
 // error information to be added to exceptions
 using errinfo_invalidSymbol = boost::error_info<struct tag_invalidSymbol, char>;
 using errinfo_comment = boost::error_info<struct tag_comment, std::string>;
-using errinfo_required = boost::error_info<struct tag_required, bigint>;
-using errinfo_got = boost::error_info<struct tag_got, bigint>;
-using errinfo_required_h256 = boost::error_info<struct tag_required_h256, h256>;
-using errinfo_got_h256 = boost::error_info<struct tag_get_h256, h256>;
 
 }