diff --git a/examples/self_modify_code/self_modify_code.c b/examples/self_modify_code/self_modify_code.c
index 40f0940764fa2271ea64fedc95946857a2d70df5..bad54d8a01f208ee999f0f42b1d9366022e16154 100644
--- a/examples/self_modify_code/self_modify_code.c
+++ b/examples/self_modify_code/self_modify_code.c
@@ -22,6 +22,7 @@ uint32_t ReadCSRSelfModify( uint16_t whichcsr )
 	// instructions in this way.  Otherwise, the compiler will try
 	// to optimize the code and inline the assembly int something where
 	// our global handle into assembly code becomes meaningless.
+	// Annoyingly, it has to contain at least one instruction :(
 	asm volatile( "nop" );
 
 	// 000026f3 is csrrs a3, 0x000, x0; So, we modify it, placing the