diff --git a/gcc/c/c-parser.c b/gcc/c/c-parser.c
index d5f51b11423..407f279fc03 100644
--- a/gcc/c/c-parser.c
+++ b/gcc/c/c-parser.c
@@ -21710,9 +21710,18 @@ c_parser_omp_requires (c_parser *parser)
 		      error_at (c_parser_peek_token (parser)->location,
 				"expected %<seq_cst%>, %<relaxed%> or "
 				"%<acq_rel%>");
-		      if (c_parser_peek_2nd_token (parser)->type
-			  == CPP_CLOSE_PAREN)
-			c_parser_consume_token (parser);
+		      switch (c_parser_peek_token (parser)->type)
+			{
+			case CPP_EOF:
+			case CPP_PRAGMA_EOL:
+			case CPP_CLOSE_PAREN:
+			  break;
+			default:
+			  if (c_parser_peek_2nd_token (parser)->type
+			      == CPP_CLOSE_PAREN)
+			    c_parser_consume_token (parser);
+			  break;
+			}
 		    }
 		  else
 		    c_parser_consume_token (parser);
diff --git a/gcc/cp/parser.c b/gcc/cp/parser.c
index 1d48b8333fe..0af1a2ccfbc 100644
--- a/gcc/cp/parser.c
+++ b/gcc/cp/parser.c
@@ -45479,9 +45479,18 @@ cp_parser_omp_requires (cp_parser *parser, cp_token *pragma_tok)
 		      error_at (cp_lexer_peek_token (parser->lexer)->location,
 				"expected %<seq_cst%>, %<relaxed%> or "
 				"%<acq_rel%>");
-		      if (cp_lexer_nth_token_is (parser->lexer, 2,
-						 CPP_CLOSE_PAREN))
-			cp_lexer_consume_token (parser->lexer);
+		      switch (cp_lexer_peek_token (parser->lexer)->type)
+			{
+			case CPP_EOF:
+			case CPP_PRAGMA_EOL:
+			case CPP_CLOSE_PAREN:
+			  break;
+			default:
+			  if (cp_lexer_nth_token_is (parser->lexer, 2,
+						     CPP_CLOSE_PAREN))
+			    cp_lexer_consume_token (parser->lexer);
+			  break;
+			}
 		    }
 		  else
 		    cp_lexer_consume_token (parser->lexer);
diff --git a/gcc/testsuite/c-c++-common/gomp/requires-3.c b/gcc/testsuite/c-c++-common/gomp/requires-3.c
index e5a6cbbdd2a..0e55b666ebf 100644
--- a/gcc/testsuite/c-c++-common/gomp/requires-3.c
+++ b/gcc/testsuite/c-c++-common/gomp/requires-3.c
@@ -1,3 +1,5 @@
 #pragma omp requires atomic_default_mem_order(acquire)	/* { dg-error "expected 'seq_cst', 'relaxed' or 'acq_rel'" } */
 #pragma omp requires atomic_default_mem_order(release)	/* { dg-error "expected 'seq_cst', 'relaxed' or 'acq_rel'" } */
 #pragma omp requires atomic_default_mem_order(foobar)	/* { dg-error "expected 'seq_cst', 'relaxed' or 'acq_rel'" } */
+#pragma omp requires atomic_default_mem_order (	/* { dg-error "expected 'seq_cst', 'relaxed' or 'acq_rel'" } */
+/* { dg-error "expected '\\\)' before end of line" "" { target *-*-* } .-1 } */