diff --git a/base/common/LineReader.cpp b/base/common/LineReader.cpp
index b2bc929a1df..a32906dd5a5 100644
--- a/base/common/LineReader.cpp
+++ b/base/common/LineReader.cpp
@@ -127,7 +127,7 @@ String LineReader::readLine(const String & first_prompt, const String & second_p
         }
 #endif
 
-        line += (line.empty() ? "" : " ") + input;
+        line += (line.empty() ? "" : "\n") + input;
 
         if (!need_next_line)
             break;
diff --git a/tests/queries/0_stateless/01599_multiline_input_and_singleline_comments.reference b/tests/queries/0_stateless/01599_multiline_input_and_singleline_comments.reference
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/tests/queries/0_stateless/01599_multiline_input_and_singleline_comments.sh b/tests/queries/0_stateless/01599_multiline_input_and_singleline_comments.sh
new file mode 100755
index 00000000000..5b7d1356dc6
--- /dev/null
+++ b/tests/queries/0_stateless/01599_multiline_input_and_singleline_comments.sh
@@ -0,0 +1,25 @@
+#!/usr/bin/expect -f
+
+log_user 0
+set timeout 5
+match_max 100000
+
+if ![info exists env(CLICKHOUSE_PORT_TCP)] {set env(CLICKHOUSE_PORT_TCP) 9000}
+
+spawn clickhouse-client --multiline --port "$env(CLICKHOUSE_PORT_TCP)"
+expect ":) "
+
+# Make a query
+send -- "SELECT 1\r"
+expect ":-] "
+send -- "-- xxx\r"
+expect ":-] "
+send -- ", 2\r"
+expect ":-] "
+send -- ";\r"
+
+expect "│ 1 │ 2 │"
+expect ":) "
+
+send -- "\4"
+expect eof