diff --git a/complex.c b/complex.c
index 5aa76ad230..81fdb4fa4b 100644
--- a/complex.c
+++ b/complex.c
@@ -1233,7 +1233,7 @@ nucomp_hash(VALUE self)
     n = rb_hash(dat->imag);
     h[1] = NUM2LONG(n);
     v = rb_memhash(h, sizeof(h));
-    return LONG2FIX(v);
+    return ST2FIX(v);
 }
 
 /* :nodoc: */
diff --git a/rational.c b/rational.c
index c495f73654..cd50b63604 100644
--- a/rational.c
+++ b/rational.c
@@ -1710,7 +1710,7 @@ nurat_hash(VALUE self)
     n = rb_hash(dat->den);
     h[1] = NUM2LONG(n);
     v = rb_memhash(h, sizeof(h));
-    return LONG2FIX(v);
+    return ST2FIX(v);
 }
 
 static VALUE
diff --git a/test/ruby/test_complex.rb b/test/ruby/test_complex.rb
index 8e5f637b79..4ebc69e9b1 100644
--- a/test/ruby/test_complex.rb
+++ b/test/ruby/test_complex.rb
@@ -48,8 +48,12 @@ class Complex_Test < Test::Unit::TestCase
   end
 
   def test_hash
-    assert_kind_of(Integer, Complex(1,2).hash)
-    assert_kind_of(Integer, Complex(1.0,2.0).hash)
+    h = Complex(1,2).hash
+    assert_kind_of(Integer, h)
+    assert_nothing_raised {h.to_s}
+    h = Complex(1.0,2.0).hash
+    assert_kind_of(Integer, h)
+    assert_nothing_raised {h.to_s}
 
     h = {}
     h[Complex(0)] = 0
diff --git a/test/ruby/test_rational.rb b/test/ruby/test_rational.rb
index 20989a572e..c5469bf7b1 100644
--- a/test/ruby/test_rational.rb
+++ b/test/ruby/test_rational.rb
@@ -42,7 +42,9 @@ class Rational_Test < Test::Unit::TestCase
   end
 
   def test_hash
-    assert_kind_of(Integer, Rational(1,2).hash)
+    h = Rational(1,2).hash
+    assert_kind_of(Integer, h)
+    assert_nothing_raised {h.to_s}
 
     h = {}
     h[Rational(0)] = 0
diff --git a/version.h b/version.h
index 6ab0643884..46c1b8e13f 100644
--- a/version.h
+++ b/version.h
@@ -1,6 +1,6 @@
 #define RUBY_VERSION "2.4.4"
 #define RUBY_RELEASE_DATE "2018-03-22"
-#define RUBY_PATCHLEVEL 279
+#define RUBY_PATCHLEVEL 280
 
 #define RUBY_RELEASE_YEAR 2018
 #define RUBY_RELEASE_MONTH 3