diff --git a/Makefile.am b/Makefile.am
index 5c31668..af27397 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -151,7 +151,7 @@ mac: ucblogo helpfiles/HELPCONTENTS helpfiles/ALL_NAMES
 
 ucblogo.dmg : mac docs/ucblogo.pdf
 	rm -f ucblogo.dmg ucblogo_base.dmg
-	hdiutil create -size 15m -fs HFS+ -volname "UCBLogo" ucblogo_base.dmg
+	hdiutil create -size 20m -fs HFS+ -volname "UCBLogo" ucblogo_base.dmg
 	hdiutil attach ucblogo_base.dmg
 	cp -a UCBLogo.app /Volumes/UCBLogo/
 	cp docs/ucblogo.pdf /Volumes/UCBLogo/UCBLogoUserManual.pdf
diff --git a/README.md b/README.md
index 3b624e5..0150b21 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,6 @@ along with this program.  If not, see https://www.gnu.org/licenses/.
 
 This uses the repository https://github.com/jrincayc/ucblogo-code
 created for further UCBLogo development.
-The current version is 6.2
 
 Changes for this release:
 * Added optional object oriented LOGO features ( --enable-objects )
diff --git a/configure.ac b/configure.ac
index 8451e9c..35ecadd 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,6 +1,6 @@
 dnl Process this file with autoconf to produce a configure script.
 AC_PREREQ([2.69])
-AC_INIT([ucblogo],[6.2.2],[],[],[https://github.com/jrincayc/ucblogo-code])
+AC_INIT([ucblogo],[6.2.3],[],[],[https://github.com/jrincayc/ucblogo-code])
 AC_CONFIG_SRCDIR([logodata.c])
 AC_CONFIG_HEADERS(config.h)
 
diff --git a/inno/ucblogo.iss b/inno/ucblogo.iss
index a64d9d4..ad5c5ec 100644
--- a/inno/ucblogo.iss
+++ b/inno/ucblogo.iss
@@ -3,13 +3,13 @@
 
 [Setup]
 AppName=Berkeley Logo
-AppVerName=Berkeley Logo 6.2.2
-AppVersion=6.2.2
+AppVerName=Berkeley Logo 6.2.3
+AppVersion=6.2.3
 AppPublisher=University of California, Berkeley
 AppPublisherURL=http://www.cs.berkeley.edu/~bh/logo.html
 AppSupportURL=https://github.com/jrincayc/ucblogo-code/issues
 AppUpdatesURL=https://github.com/jrincayc/ucblogo-code/releases
-OutputBaseFilename=ucblogo622setup
+OutputBaseFilename=ucblogo623setup
 OutputDir=.
 DefaultDirName={autopf}\UCBLogo
 DefaultGroupName=Berkeley Logo
diff --git a/wxTerminal.cpp b/wxTerminal.cpp
index 139eef6..448aad1 100644
--- a/wxTerminal.cpp
+++ b/wxTerminal.cpp
@@ -1862,7 +1862,7 @@ wxTerminal::UpdateSelectionColors()
     0.587 * wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHT).Green() / 255 +
     0.114 * wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHT).Blue() / 255;
 
-  if (abs(terminal_background_luminance - system_background_luminance) >= 0.5) {
+  if (fabs(terminal_background_luminance - system_background_luminance) >= 0.5) {
     // Reasonable contrast between system selection background and terminal background.
     m_selection_foreground = wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHTTEXT);
     m_selection_background = wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHT);