diff --git a/src/verilog.y b/src/verilog.y
index fbd35fd85..32967ac33 100644
--- a/src/verilog.y
+++ b/src/verilog.y
@@ -1527,7 +1527,7 @@ assignOne<nodep>:
 
 delayE:
 		/* empty */				{ }
-	|	delay_control				{ $1->v3warn(ASSIGNDLY,"Ignoring delay on this assignment/primitive."); } /* ignored */
+	|	delay_control				{ $1->v3warn(ASSIGNDLY,"Unsupported: Ignoring delay on this assignment/primitive."); } /* ignored */
 	;
 
 delay_control<fl>:	//== IEEE: delay_control
@@ -1929,7 +1929,7 @@ statement_item<nodep>:		// IEEE: statement_item
 	//
 	//UNSUP	par_block				{ $$ = $1; }
 	//			// IEEE: procedural_timing_control_statement + procedural_timing_control
-	|	delay_control stmtBlock			{ $$ = $2; $1->v3warn(STMTDLY,"Ignoring delay on this delayed statement."); }
+	|	delay_control stmtBlock			{ $$ = $2; $1->v3warn(STMTDLY,"Unsupported: Ignoring delay on this delayed statement."); }
 	//UNSUP	event_control stmtBlock			{ UNSUP }
 	//UNSUP	cycle_delay stmtBlock			{ UNSUP }
 	//
diff --git a/test_regress/t/t_delay_stmtdly_bad.pl b/test_regress/t/t_delay_stmtdly_bad.pl
index 730ce27fc..9e5bd4717 100755
--- a/test_regress/t/t_delay_stmtdly_bad.pl
+++ b/test_regress/t/t_delay_stmtdly_bad.pl
@@ -15,11 +15,11 @@ compile (
 	 verilator_flags2 => ['-Wall -Wno-DECLFILENAME'],
 	 fails=>1,
 	 expect=>
-'%Warning-ASSIGNDLY: t/t_delay.v:\d+: Ignoring delay on this assignment/primitive.
+'%Warning-ASSIGNDLY: t/t_delay.v:\d+: Unsupported: Ignoring delay on this assignment/primitive.
 %Warning-ASSIGNDLY: Use .*
-%Warning-ASSIGNDLY: t/t_delay.v:\d+: Ignoring delay on this assignment/primitive.
-%Warning-ASSIGNDLY: t/t_delay.v:\d+: Ignoring delay on this assignment/primitive.
-%Warning-STMTDLY: t/t_delay.v:\d+: Ignoring delay on this delayed statement.
+%Warning-ASSIGNDLY: t/t_delay.v:\d+: Unsupported: Ignoring delay on this assignment/primitive.
+%Warning-ASSIGNDLY: t/t_delay.v:\d+: Unsupported: Ignoring delay on this assignment/primitive.
+%Warning-STMTDLY: t/t_delay.v:\d+: Unsupported: Ignoring delay on this delayed statement.
 .*%Error: Exiting due to.*',
 	 );