diff --git a/src/threading/SerialTypes.cc b/src/threading/SerialTypes.cc
index dcc35f793c..1681bece88 100644
--- a/src/threading/SerialTypes.cc
+++ b/src/threading/SerialTypes.cc
@@ -91,6 +91,9 @@ Value::~Value()
 	     && present )
 		delete [] val.string_val.data;
 
+	if ( type == TYPE_PATTERN && present)
+		delete val.pattern_text_val;
+
 	if ( type == TYPE_TABLE && present )
 		{
 		for ( int i = 0; i < val.set_val.size; i++ )
@@ -414,4 +417,3 @@ bool Value::Write(SerializationFormat* fmt) const
 
 	return false;
 	}
-
diff --git a/testing/btest/core/leaks/input-patterns.zeek b/testing/btest/core/leaks/input-patterns.zeek
new file mode 100644
index 0000000000..4fe6fc38ea
--- /dev/null
+++ b/testing/btest/core/leaks/input-patterns.zeek
@@ -0,0 +1,54 @@
+# Needs perftools support.
+#
+# @TEST-GROUP: leaks
+#
+# @TEST-REQUIRES: zeek  --help 2>&1 | grep -q mem-leaks
+#
+# @TEST-EXEC: HEAP_CHECK_DUMP_DIRECTORY=. HEAPCHECK=local btest-bg-run zeek zeek -m -b %INPUT
+# @TEST-EXEC: btest-bg-wait 60
+
+redef exit_only_after_terminate = T;
+
+@TEST-START-FILE input.log
+#separator \x09
+#fields	i	p
+#types	count	pattern
+1	/dog/
+2	/cat/
+3	/foo|bar/
+4	/^oob/
+5 /foo/
+6 /foo/
+@TEST-END-FILE
+
+global outfile: file;
+
+module A;
+
+type Idx: record {
+	i: int;
+};
+
+type Val: record {
+	p: pattern;
+};
+
+global pats: table[int] of Val = table();
+
+event zeek_init()
+	{
+	outfile = open("../out");
+	# first read in the old stuff into the table...
+	Input::add_table([$source="../input.log", $name="pats", $idx=Idx, $val=Val, $destination=pats]);
+	}
+
+event Input::end_of_data(name: string, source:string)
+	{
+	print outfile, (pats[3]$p in "foobar"); # T
+	print outfile, (pats[4]$p in "foobar"); # F
+	print outfile, (pats[3]$p == "foo"); # T
+	print outfile, pats;
+	Input::remove("pats");
+	close(outfile);
+	terminate();
+	}