diff --git a/SConstruct b/SConstruct
index ea59052cf..04f4104f1 100644
--- a/SConstruct
+++ b/SConstruct
@@ -830,7 +830,7 @@ class DXXProgram(DXXCommon):
 'editor/kcurve.cpp',
 'editor/kfuncs.cpp',
 'editor/kgame.cpp',
-'editor/khelp.c',
+'editor/khelp.cpp',
 'editor/kmine.c',
 'editor/ksegmove.c',
 'editor/ksegsel.c',
diff --git a/similar/editor/khelp.c b/similar/editor/khelp.cpp
similarity index 91%
rename from similar/editor/khelp.c
rename to similar/editor/khelp.cpp
index 19fcc94f5..2fb9b6dcb 100644
--- a/similar/editor/khelp.c
+++ b/similar/editor/khelp.cpp
@@ -20,10 +20,11 @@ COPYRIGHT 1993-1998 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
 
 #include "inferno.h"
 #include "editor.h"
+#include "kdefs.h"
 
 #include "ui.h"
 
-static char MainHelpText[] = "\nMED General Functions\n\n" \
+static const char MainHelpText[] = "\nMED General Functions\n\n" \
 "SPACEBAR         Full Redraw\n" \
 "BACKSPACE        Drop into debugger\n\n" \
 "A                Attach a segment\n" \
@@ -36,7 +37,7 @@ static char MainHelpText[] = "\nMED General Functions\n\n" \
 "ESC              Exit editor\n"\
 "ALT-Q/CTRL-Q/SHIFT-Q also Exit editor\n";
 
-static char SegmentHelpText[] = "MED Segment Functions\n\n" \
+static const char SegmentHelpText[] = "MED Segment Functions\n\n" \
 "ALT-B            Create Bridge from current to marked segment\n" \
 "ALT-E            Exchange current and marked segments\n" \
 "ALT-J            Create Joint between current and marked segments\n" \
@@ -56,7 +57,7 @@ static char SegmentHelpText[] = "MED Segment Functions\n\n" \
 "CTRL-F           Select next side\n" \
 "CTRL-SHIFT-F     Select previous side\n";
 
-static char KeyPadHelpText[] = "MED KeyPad Functions\n\n" \
+static const char KeyPadHelpText[] = "MED KeyPad Functions\n\n" \
 
 "SHIFT-KEYPAD FUNCTIONS (Change direction vector of segment)\n" \
 "----------------------\n" \
@@ -72,7 +73,7 @@ static char KeyPadHelpText[] = "MED KeyPad Functions\n\n" \
 "\nIn addition, CTRL-SHIFT-KEYPAD Changes size at x5 rate as above\n";
 
 
-char ViewHelpText[] = "MED View Changing Functions\n\n" \
+static const char ViewHelpText[] = "MED View Changing Functions\n\n" \
 "ALT-V            Change to orthogonal view (1,2,3)\n" \
 "CTRL-V           Toggle view to current segment\n" \
 "MINUS (-)        Zoom in\n" \
@@ -85,7 +86,7 @@ char ViewHelpText[] = "MED View Changing Functions\n\n" \
 //"CTRL-MINUS       Decreases drawing depth\n" 
 //"CTRL-EQUAL       Increases drawing depth\n" 
 
-static char GameHelpText[] = "MED Game Screen Functions\n\n" \
+static const char GameHelpText[] = "MED Game Screen Functions\n\n" \
 "KEYPAD FUNCTIONS (Moves in game screen)\n" \
 "----------------\n" \
 "(7)                  8 Move Forward     (9)\n" \
@@ -102,7 +103,7 @@ static char GameHelpText[] = "MED Game Screen Functions\n\n" \
 "PAD DIVIDE (/)   Game Zoom out\n" \
 "PAD MULTIPLY (*) Game Zoom In\n";
 
-static char CurveHelpText[] = "MED Curve Generation Functions\n\n" \
+static const char CurveHelpText[] = "MED Curve Generation Functions\n\n" \
 "ALT-F10          Generate curve\n" \
 "F8               Delete curve\n" \
 "F11              'Set' curve\n" \
@@ -111,7 +112,7 @@ static char CurveHelpText[] = "MED Curve Generation Functions\n\n" \
 "F10              Decrease r4 vector\n" \
 "SHIFT-F10        Increase r4 vector\n";
 
-static char MacrosHelpText[] = "MED Macros Functions\n\n" \
+static const char MacrosHelpText[] = "MED Macros Functions\n\n" \
 "CTRL-INSERT      Play fast\n" \
 "CTRL-DELETE      Play normal\n" \
 "CTRL-HOME        Record all\n" \