diff --git a/src/mesa/main/matrix.c b/src/mesa/main/matrix.c
index e2c2a204271..8236467a5bc 100644
--- a/src/mesa/main/matrix.c
+++ b/src/mesa/main/matrix.c
@@ -554,7 +554,12 @@ static void
 matrix_mult(struct gl_matrix_stack *stack, const GLfloat *m, const char* caller)
 {
    GET_CURRENT_CONTEXT(ctx);
-   if (!m) return;
+   if (!m ||
+       (m[0]  == 1 && m[1]  == 0 && m[2]  == 0 && m[3]  == 0 &&
+        m[4]  == 0 && m[5]  == 1 && m[6]  == 0 && m[7]  == 0 &&
+        m[8]  == 0 && m[9]  == 0 && m[10] == 1 && m[11] == 0 &&
+        m[12] == 0 && m[13] == 0 && m[14] == 0 && m[15] == 1))
+      return;
    if (MESA_VERBOSE & VERBOSE_API)
       _mesa_debug(ctx,
           "%s(%f %f %f %f, %f %f %f %f, %f %f %f %f, %f %f %f %f\n",