update comments
diff --git a/src/mesa/shader/prog_execute.c b/src/mesa/shader/prog_execute.c
index d42b2e9..a63298b 100644
--- a/src/mesa/shader/prog_execute.c
+++ b/src/mesa/shader/prog_execute.c
@@ -615,9 +615,9 @@
/**
* Execute the given vertex/fragment program.
*
- * \param ctx - rendering context
- * \param program - the fragment program to execute
- * \param machine - machine state (register file)
+ * \param ctx rendering context
+ * \param program the program to execute
+ * \param machine machine state (must be initialized)
* \return GL_TRUE if program completed or GL_FALSE if program executed KIL.
*/
GLboolean