diff --git a/ChangeLog b/ChangeLog
index ca8428f1a2..f11b311694 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+Sun Feb 22 21:43:34 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* numeric.c (ruby_float_step): extracted from num_step().
+
+	* range.c (range_step): uses ruby_float_step() for float range.
+	  [ruby-dev:37691]
+
 Sun Feb 22 00:49:36 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* ext/extmk.rb (extmake): does not use both of makefile.rb and
diff --git a/numeric.c b/numeric.c
index 4f181035ae..de00de20d9 100644
--- a/numeric.c
+++ b/numeric.c
@@ -1427,6 +1427,33 @@ num_truncate(num)
 }
 
 
+int ruby_float_step _((VALUE from, VALUE to, VALUE step, int excl));
+
+int
+ruby_float_step(from, to, step, excl)
+    VALUE from, to, step;
+    int excl;
+{
+    if (TYPE(from) == T_FLOAT || TYPE(to) == T_FLOAT || TYPE(step) == T_FLOAT) {
+	const double epsilon = DBL_EPSILON;
+	double beg = NUM2DBL(from);
+	double end = NUM2DBL(to);
+	double unit = NUM2DBL(step);
+	double n = (end - beg)/unit;
+	double err = (fabs(beg) + fabs(end) + fabs(end-beg)) / fabs(unit) * epsilon;
+	long i;
+
+	if (err>0.5) err=0.5;
+	n = floor(n + err);
+	if (!excl) n++;
+	for (i=0; i<n; i++) {
+	    rb_yield(rb_float_new(i*unit+beg));
+	}
+	return Qtrue;
+    }
+    return Qfalse;
+}
+
 /*
  *  call-seq:
  *     num.step(limit, step ) {|i| block }     => num
@@ -1501,22 +1528,7 @@ num_step(argc, argv, from)
 	    }
 	}
     }
-    else if (TYPE(from) == T_FLOAT || TYPE(to) == T_FLOAT || TYPE(step) == T_FLOAT) {
-	const double epsilon = DBL_EPSILON;
-	double beg = NUM2DBL(from);
-	double end = NUM2DBL(to);
-	double unit = NUM2DBL(step);
-	double n = (end - beg)/unit;
-	double err = (fabs(beg) + fabs(end) + fabs(end-beg)) / fabs(unit) * epsilon;
-	long i;
-
-	if (err>0.5) err=0.5;
-	n = floor(n + err) + 1;
-	for (i=0; i<n; i++) {
-	    rb_yield(rb_float_new(i*unit+beg));
-	}
-    }
-    else {
+    else if (!ruby_float_step(from, to, step, Qfalse)) {
 	VALUE i = from;
 	ID cmp;
 
diff --git a/range.c b/range.c
index 7526324da7..864ca9fb28 100644
--- a/range.c
+++ b/range.c
@@ -273,6 +273,8 @@ step_i(i, arg)
     return Qnil;
 }
 
+extern int ruby_float_step _((VALUE from, VALUE to, VALUE step, int excl));
+
 /*
  *  call-seq:
  *     rng.step(n=1) {| obj | block }    => rng
@@ -343,6 +345,9 @@ range_step(argc, argv, range)
 	}
 
     }
+    else if (ruby_float_step(b, e, step, EXCL(range))) {
+	/* done */
+    }
     else if (rb_obj_is_kind_of(b, rb_cNumeric) ||
 	     !NIL_P(rb_check_to_integer(b, "to_int")) ||
 	     !NIL_P(rb_check_to_integer(e, "to_int"))) {
diff --git a/version.h b/version.h
index c0835b6712..9c67e7aa48 100644
--- a/version.h
+++ b/version.h
@@ -2,7 +2,7 @@
 #define RUBY_RELEASE_DATE "2009-02-22"
 #define RUBY_VERSION_CODE 187
 #define RUBY_RELEASE_CODE 20090222
-#define RUBY_PATCHLEVEL 136
+#define RUBY_PATCHLEVEL 137
 
 #define RUBY_VERSION_MAJOR 1
 #define RUBY_VERSION_MINOR 8