diff --git a/test/testdyngl.c b/test/testdyngl.c
index 0c1f0f222..77dce2d44 100644
--- a/test/testdyngl.c
+++ b/test/testdyngl.c
@@ -100,6 +100,8 @@ int main(int argc,char *argv[])
 	char *gl_library = "OpenGL32.DLL";
 #elif defined(__QNXNTO__)
 	char *gl_library = "libGL.so.3";
+#elif defined(_SGI_SOURCE)
+	char *gl_library = "libGL.so";
 #else
 	char *gl_library = "libGL.so.1";
 #endif