diff --git a/joiners.scad b/joiners.scad
index 330e2dd..38b4ea4 100644
--- a/joiners.scad
+++ b/joiners.scad
@@ -438,8 +438,13 @@ module joiner_quad(spacing1=undef, spacing2=undef, xspacing=undef, yspacing=unde
 }
 
 
+// Section: Dovetails
+
 // Module: dovetail()
 //
+// Usage:
+//   dovetail(l|length, h|height, w|width, slope|angle, taper|width2, [chamfer], [r|radius], [round], [$slop])
+//
 // Description:
 //   Produces a possibly tapered dovetail joint shape to attach to or subtract from two parts you wish to join together.
 //   The tapered dovetail is particularly advantageous for long joints because the joint assembles without binding until
@@ -448,9 +453,6 @@ module joiner_quad(spacing1=undef, spacing2=undef, xspacing=undef, yspacing=unde
 //   parallel to the X axis and projecting upwards, so in its default orientation it will slide together with a translation
 //   in the X direction.
 //
-// Usage:
-//   dovetail(l|length, h|height, w|width, slope|angle, taper|width2, chamfer, r|radius, round, anchor, orient, spin)
-//
 // Arguments:
 //   l / length = Length of the dovetail (amount the joint slides during assembly)
 //   h / height = Height of the dovetail
@@ -534,8 +536,8 @@ module dovetail(gender, length, l, width, w, height, h, angle, slope, taper, wid
 	assert(count3<=1 || (radius==0 && chamfer==0), "Do not specify both chamfer and radius");
 	slope = is_def(slope) ? slope :
 		is_def(angle) ? 1/tan(angle) :  6;
-	width = gender == "male" ? w : w + $slop;
-	height = h + (gender == "female" ? $slop : 0);
+	width = gender == "male" ? w : w + 2*$slop;
+	height = h + (gender == "female" ? 2*$slop : 0);
 
 	front_offset = is_def(taper) ? extra * tan(taper) :
 		is_def(width2) ? extra * (width2-width)/length/2 : 0;
diff --git a/version.scad b/version.scad
index 6f109a4..ddce1c4 100644
--- a/version.scad
+++ b/version.scad
@@ -8,7 +8,7 @@
 //////////////////////////////////////////////////////////////////////
 
 
-BOSL_VERSION = [2,0,80];
+BOSL_VERSION = [2,0,81];
 
 
 // Section: BOSL Library Version Functions