diff --git a/common/main/segment.h b/common/main/segment.h
index 098f7b00c..2bc3c27dd 100644
--- a/common/main/segment.h
+++ b/common/main/segment.h
@@ -96,7 +96,6 @@ struct segment {
 	ubyte   special;    // what type of center this is
 	sbyte   matcen_num; // which center segment is associated with.
 	fix     static_light;
-	int     degenerated; // true if this segment has gotten turned inside out, or something.
 #if defined(DXX_BUILD_DESCENT_I)
 	short   value;
 #elif defined(DXX_BUILD_DESCENT_II)
diff --git a/similar/main/gameseg.cpp b/similar/main/gameseg.cpp
index 38456186e..c48405449 100644
--- a/similar/main/gameseg.cpp
+++ b/similar/main/gameseg.cpp
@@ -1588,7 +1588,7 @@ void validate_segment(segment *sp)
 {
 	int	side;
 
-	sp->degenerated = check_for_degenerate_segment(sp);
+	check_for_degenerate_segment(sp);
 
 	for (side = 0; side < MAX_SIDES_PER_SEGMENT; side++)
 		validate_segment_side(sp, side);