diff --git a/cde/programs/dtscreen/worm.c b/cde/programs/dtscreen/worm.c
index e80c797e1..0eb6567d1 100644
--- a/cde/programs/dtscreen/worm.c
+++ b/cde/programs/dtscreen/worm.c
@@ -88,7 +88,7 @@ typedef struct {
     int         size[MAXCOLORS];
 }           wormstruct;
 
-#if !defined(CSRG_BASED) && !defined(sun)
+#if !defined(CSRG_BASED) && !defined(sun) && !defined(linux)
 int
 round(float x)
 {