diff --git a/code/renderer/tr_main.c b/code/renderer/tr_main.c
index 9d4edef7..e7c05424 100644
--- a/code/renderer/tr_main.c
+++ b/code/renderer/tr_main.c
@@ -525,7 +525,7 @@ void R_SetupProjection(viewParms_t *dest, float zProj, qboolean computeFrustum)
 		if(dest->stereoFrame == STEREO_LEFT)
 			stereoSep = zProj / stereoSep;
 		else if(dest->stereoFrame == STEREO_RIGHT)
-			stereoSep = zProj / stereoSep;
+			stereoSep = zProj / -stereoSep;
 		else
 			stereoSep = 0;
 	}