diff --git a/CHANGES b/CHANGES
index 44c6a83484..da3a04bc18 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,4 +1,11 @@
 
+2.6-616 | 2019-07-16 15:21:37 +0000
+
+  * Fix referecne counting bug in EnumType copy constructor. (Jon
+    Siwek, Corelight)
+
+  * Remove unused BroObj::in_ser_cache member. (Jon Siwek, Corelight)
+
 2.6-612 | 2019-07-15 19:46:04 -0700
 
   * Fix a potential usage of List::remove_nth(-1) (Jon Siwek, Corelight)
diff --git a/VERSION b/VERSION
index e6aa2f840a..e3ec0cf2b1 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.6-612
+2.6-616
diff --git a/src/Type.cc b/src/Type.cc
index f0605c9a06..498763a0f8 100644
--- a/src/Type.cc
+++ b/src/Type.cc
@@ -1088,6 +1088,9 @@ EnumType::EnumType(const EnumType* e)
 		names[it->first] = it->second;
 
 	vals = e->vals;
+
+	for ( auto& kv : vals )
+		::Ref(kv.second);
 	}
 
 EnumType* EnumType::ShallowClone()
diff --git a/testing/btest/Baseline/language.enum-multiple-decls/out b/testing/btest/Baseline/language.enum-multiple-decls/out
new file mode 100644
index 0000000000..a2628c1e09
--- /dev/null
+++ b/testing/btest/Baseline/language.enum-multiple-decls/out
@@ -0,0 +1 @@
+ONE
diff --git a/testing/btest/language/enum-multiple-decls.zeek b/testing/btest/language/enum-multiple-decls.zeek
new file mode 100644
index 0000000000..f921ca120f
--- /dev/null
+++ b/testing/btest/language/enum-multiple-decls.zeek
@@ -0,0 +1,10 @@
+# @TEST-EXEC: zeek -b %INPUT >out
+# @TEST-EXEC: btest-diff out
+
+# At the moment, it's legal to allow a double definitions.  Internally, the
+# reason/comment is: "so that we can define an enum both in a *.bif and *.zeek
+# for avoiding cyclic dependencies."
+
+type myenum: enum { ONE = 0x01 };
+type myenum: enum { ONE = 0x01 };
+print ONE;