diff --git a/common/include/3d.h b/common/include/3d.h
index 630e150d8..0e1ad530b 100644
--- a/common/include/3d.h
+++ b/common/include/3d.h
@@ -35,7 +35,9 @@ COPYRIGHT 1993-1998 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
 
 struct grs_bitmap;
 
+#ifdef EDITOR
 extern int g3d_interp_outline;      //if on, polygon models outlined in white
+#endif
 
 //Structure for storing u,v,light values.  This structure doesn't have a
 //prefix because it was defined somewhere else before it was moved here
diff --git a/similar/3d/interp.cpp b/similar/3d/interp.cpp
index 1c6e83ca9..80758e6f3 100644
--- a/similar/3d/interp.cpp
+++ b/similar/3d/interp.cpp
@@ -34,10 +34,9 @@ static const unsigned OP_GLOW = 8;   //glow value for next poly
 
 static uint16_t init_model_sub(uint8_t *p, uint16_t);
 
+#ifdef EDITOR
 int g3d_interp_outline;
-
-
-#define MAX_INTERP_COLORS 100
+#endif
 
 static inline int16_t *wp(uint8_t *p)
 {