diff --git a/ChangeLog b/ChangeLog
index f2592eb9f6..819c6fe4f2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sat Mar  1 21:00:27 2014  Marc-Andre Lafortune  <ruby-core@marc-andre.ca>
+
+	* proc.c: Having optional keyword arguments makes maximum arity +1,
+	  not unlimited [#8072]
+
 Sat Mar  1 17:25:12 2014  Marc-Andre Lafortune  <ruby-core@marc-andre.ca>
 
 	* proc.c: Having any mandatory keyword argument increases min arity
diff --git a/proc.c b/proc.c
index 9c88ada316..e3cecb7bbe 100644
--- a/proc.c
+++ b/proc.c
@@ -825,8 +825,9 @@ proc_arity(VALUE self)
 static inline int
 rb_iseq_min_max_arity(const rb_iseq_t *iseq, int *max)
 {
-    *max = (iseq->arg_rest == -1 && iseq->arg_keyword == -1) ?
-        iseq->argc + iseq->arg_post_len + iseq->arg_opts - (iseq->arg_opts > 0)
+    *max = iseq->arg_rest == -1 ?
+	iseq->argc + iseq->arg_post_len + iseq->arg_opts -
+	(iseq->arg_opts > 0) + (iseq->arg_keyword != -1)
       : UNLIMITED_ARGUMENTS;
     return iseq->argc + iseq->arg_post_len + (iseq->arg_keyword_required > 0);
 }
diff --git a/test/ruby/test_proc.rb b/test/ruby/test_proc.rb
index 9e8fb06d6d..1c8a053cca 100644
--- a/test/ruby/test_proc.rb
+++ b/test/ruby/test_proc.rb
@@ -77,12 +77,12 @@ class TestProc < Test::Unit::TestCase
     assert_equal(2, proc{|(x, y), z|[x,y]}.arity)
     assert_equal(1, proc{|(x, y), z=0|[x,y]}.arity)
     assert_equal(-4, proc{|x, *y, z, a|}.arity)
-    assert_equal(-1, proc{|**|}.arity)
-    assert_equal(-1, proc{|**o|}.arity)
-    assert_equal(-2, proc{|x, **o|}.arity)
-    assert_equal(-1, proc{|x=0, **o|}.arity)
-    assert_equal(-2, proc{|x, y=0, **o|}.arity)
-    assert_equal(-3, proc{|x, y=0, z, **o|}.arity)
+    assert_equal(0, proc{|**|}.arity)
+    assert_equal(0, proc{|**o|}.arity)
+    assert_equal(1, proc{|x, **o|}.arity)
+    assert_equal(0, proc{|x=0, **o|}.arity)
+    assert_equal(1, proc{|x, y=0, **o|}.arity)
+    assert_equal(2, proc{|x, y=0, z, **o|}.arity)
     assert_equal(-3, proc{|x, y=0, *z, w, **o|}.arity)
 
     assert_equal(2, proc{|x, y=0, z, a:1|}.arity)
diff --git a/version.h b/version.h
index 59c80e3828..746643bda1 100644
--- a/version.h
+++ b/version.h
@@ -1,6 +1,6 @@
 #define RUBY_VERSION "2.1.2"
 #define RUBY_RELEASE_DATE "2014-03-01"
-#define RUBY_PATCHLEVEL 79
+#define RUBY_PATCHLEVEL 80
 
 #define RUBY_RELEASE_YEAR 2014
 #define RUBY_RELEASE_MONTH 3