diff --git a/src/video/x11/SDL_x11gl.c b/src/video/x11/SDL_x11gl.c
index cb5dde89f..c0349af36 100644
--- a/src/video/x11/SDL_x11gl.c
+++ b/src/video/x11/SDL_x11gl.c
@@ -34,7 +34,12 @@ static char rcsid =
 #include "SDL_x11dga_c.h"
 #include "SDL_x11gl_c.h"
 
+#if defined(sgi)
+/* IRIX doesn't have a GL library versioning system */
+#define DEFAULT_OPENGL	"libGL.so"
+#else
 #define DEFAULT_OPENGL	"libGL.so.1"
+#endif
 
 #ifndef GLX_ARB_multisample
 #define GLX_ARB_multisample