diff --git a/configure b/configure
index 7baffb958..8904ff945 100755
--- a/configure
+++ b/configure
@@ -19245,11 +19245,11 @@ fi
 if test x"$debug_preference" = "xyes" ; then
       { $as_echo "$as_me:${as_lineno-$LINENO}: Adding -g for debugging to CFLAGS and CXXFLAGS ..." >&5
 $as_echo "$as_me: Adding -g for debugging to CFLAGS and CXXFLAGS ..." >&6;}
-   CFLAGS="${CFLAGS} -g -DWXDEBUG_LEVEL=1"
-   CXXFLAGS="${CXXFLAGS} -g -DWXDEBUG_LEVEL=1"
+   CFLAGS="${CFLAGS} -g -DwxDEBUG_LEVEL=1"
+   CXXFLAGS="${CXXFLAGS} -g -DwxDEBUG_LEVEL=1"
 else
-   CFLAGS="${CFLAGS} -DWXDEBUG_LEVEL=0"
-   CXXFLAGS="${CXXFLAGS} -DWXDEBUG_LEVEL=0"
+   CFLAGS="${CFLAGS} -DwxDEBUG_LEVEL=0"
+   CXXFLAGS="${CXXFLAGS} -DwxDEBUG_LEVEL=0"
 fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for an ANSI C-conforming const" >&5
diff --git a/configure.ac b/configure.ac
index b9b34b4e9..34d8af623 100644
--- a/configure.ac
+++ b/configure.ac
@@ -220,11 +220,11 @@ fi
 if test x"$debug_preference" = "xyes" ; then
    dnl we want debuging on
    AC_MSG_NOTICE([Adding -g for debugging to CFLAGS and CXXFLAGS ...])
-   CFLAGS="${CFLAGS} -g -DWXDEBUG_LEVEL=1"
-   CXXFLAGS="${CXXFLAGS} -g -DWXDEBUG_LEVEL=1"
+   CFLAGS="${CFLAGS} -g -DwxDEBUG_LEVEL=1"
+   CXXFLAGS="${CXXFLAGS} -g -DwxDEBUG_LEVEL=1"
 else
-   CFLAGS="${CFLAGS} -DWXDEBUG_LEVEL=0"
-   CXXFLAGS="${CXXFLAGS} -DWXDEBUG_LEVEL=0"
+   CFLAGS="${CFLAGS} -DwxDEBUG_LEVEL=0"
+   CXXFLAGS="${CXXFLAGS} -DwxDEBUG_LEVEL=0"
 fi
 
 dnl Checks for typedefs, structures, and compiler characteristics.
diff --git a/lib-src/FileDialog/configure b/lib-src/FileDialog/configure
index 339997b4c..a72d6e226 100755
--- a/lib-src/FileDialog/configure
+++ b/lib-src/FileDialog/configure
@@ -15994,11 +15994,11 @@ WX_LIBS=""
 if test x"$debug_preference" = "xyes" ; then
       { $as_echo "$as_me:${as_lineno-$LINENO}: Adding -g for debugging to CFLAGS and CXXFLAGS ..." >&5
 $as_echo "$as_me: Adding -g for debugging to CFLAGS and CXXFLAGS ..." >&6;}
-   CFLAGS="${CFLAGS} -g -DWXDEBUG_LEVEL=1"
-   CXXFLAGS="${CXXFLAGS} -g -DWXDEBUG_LEVEL=1"
+   CFLAGS="${CFLAGS} -g -DwxDEBUG_LEVEL=1"
+   CXXFLAGS="${CXXFLAGS} -g -DwxDEBUG_LEVEL=1"
 else
-   CFLAGS="${CFLAGS} -DWXDEBUG_LEVEL=0"
-   CXXFLAGS="${CXXFLAGS} -DWXDEBUG_LEVEL=0"
+   CFLAGS="${CFLAGS} -DwxDEBUG_LEVEL=0"
+   CXXFLAGS="${CXXFLAGS} -DwxDEBUG_LEVEL=0"
 fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for gtk3 use in wxWidgets" >&5
diff --git a/lib-src/FileDialog/configure.ac b/lib-src/FileDialog/configure.ac
index 67545001b..be60c75f4 100644
--- a/lib-src/FileDialog/configure.ac
+++ b/lib-src/FileDialog/configure.ac
@@ -64,11 +64,11 @@ AC_SUBST([WX_LIBS])
 if test x"$debug_preference" = "xyes" ; then
    dnl we want debuging on
    AC_MSG_NOTICE([Adding -g for debugging to CFLAGS and CXXFLAGS ...])
-   CFLAGS="${CFLAGS} -g -DWXDEBUG_LEVEL=1"
-   CXXFLAGS="${CXXFLAGS} -g -DWXDEBUG_LEVEL=1"
+   CFLAGS="${CFLAGS} -g -DwxDEBUG_LEVEL=1"
+   CXXFLAGS="${CXXFLAGS} -g -DwxDEBUG_LEVEL=1"
 else
-   CFLAGS="${CFLAGS} -DWXDEBUG_LEVEL=0"
-   CXXFLAGS="${CXXFLAGS} -DWXDEBUG_LEVEL=0"
+   CFLAGS="${CFLAGS} -DwxDEBUG_LEVEL=0"
+   CXXFLAGS="${CXXFLAGS} -DwxDEBUG_LEVEL=0"
 fi
 
 AC_MSG_CHECKING([for gtk3 use in wxWidgets])
diff --git a/lib-src/lib-widget-extra/configure b/lib-src/lib-widget-extra/configure
index 000f9ea5d..a86b5247a 100755
--- a/lib-src/lib-widget-extra/configure
+++ b/lib-src/lib-widget-extra/configure
@@ -16227,11 +16227,11 @@ fi
 if test x"$debug_preference" = "xyes" ; then
       { $as_echo "$as_me:${as_lineno-$LINENO}: Adding -g for debugging to CFLAGS and CXXFLAGS ..." >&5
 $as_echo "$as_me: Adding -g for debugging to CFLAGS and CXXFLAGS ..." >&6;}
-   CFLAGS="${CFLAGS} -g -DWXDEBUG_LEVEL=1"
-   CXXFLAGS="${CXXFLAGS} -g -DWXDEBUG_LEVEL=1"
+   CFLAGS="${CFLAGS} -g -DwxDEBUG_LEVEL=1"
+   CXXFLAGS="${CXXFLAGS} -g -DwxDEBUG_LEVEL=1"
 else
-   CFLAGS="${CFLAGS} -DWXDEBUG_LEVEL=0"
-   CXXFLAGS="${CXXFLAGS} -DWXDEBUG_LEVEL=0"
+   CFLAGS="${CFLAGS} -DwxDEBUG_LEVEL=0"
+   CXXFLAGS="${CXXFLAGS} -DwxDEBUG_LEVEL=0"
 fi
 
 
diff --git a/lib-src/lib-widget-extra/configure.ac b/lib-src/lib-widget-extra/configure.ac
index e91006c2b..36212f8a4 100644
--- a/lib-src/lib-widget-extra/configure.ac
+++ b/lib-src/lib-widget-extra/configure.ac
@@ -65,11 +65,11 @@ dnl ----------------------------------------------------
 if test x"$debug_preference" = "xyes" ; then
    dnl we want debuging on
    AC_MSG_NOTICE([Adding -g for debugging to CFLAGS and CXXFLAGS ...])
-   CFLAGS="${CFLAGS} -g -DWXDEBUG_LEVEL=1"
-   CXXFLAGS="${CXXFLAGS} -g -DWXDEBUG_LEVEL=1"
+   CFLAGS="${CFLAGS} -g -DwxDEBUG_LEVEL=1"
+   CXXFLAGS="${CXXFLAGS} -g -DwxDEBUG_LEVEL=1"
 else
-   CFLAGS="${CFLAGS} -DWXDEBUG_LEVEL=0"
-   CXXFLAGS="${CXXFLAGS} -DWXDEBUG_LEVEL=0"
+   CFLAGS="${CFLAGS} -DwxDEBUG_LEVEL=0"
+   CXXFLAGS="${CXXFLAGS} -DwxDEBUG_LEVEL=0"
 fi
 
 dnl --------------------------------------------------------------------------