diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 5cabb68bc820..4e5662c13d70 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2018-12-05  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
+	* gcc.target/sparc/20181129-1.c: Compile with -std=c99.
+	* gcc.target/sparc/20181129-2.c: Likewise.
+
 2018-12-05  Jakub Jelinek  <jakub@redhat.com>
 
 	PR tree-optimization/87360
diff --git a/gcc/testsuite/gcc.target/sparc/20181129-1.c b/gcc/testsuite/gcc.target/sparc/20181129-1.c
index 1ee567ac9a9e..199ece8b89ac 100644
--- a/gcc/testsuite/gcc.target/sparc/20181129-1.c
+++ b/gcc/testsuite/gcc.target/sparc/20181129-1.c
@@ -2,6 +2,7 @@
 /* Reported by Rainer Orth <ro@gcc.gnu.org> */
 
 /* { dg-do run } */
+/* { dg-options "-std=c99" } */
 
 #include <stdarg.h>
 
diff --git a/gcc/testsuite/gcc.target/sparc/20181129-2.c b/gcc/testsuite/gcc.target/sparc/20181129-2.c
index f293023918b1..3b4f3362edeb 100644
--- a/gcc/testsuite/gcc.target/sparc/20181129-2.c
+++ b/gcc/testsuite/gcc.target/sparc/20181129-2.c
@@ -2,6 +2,7 @@
 /* Reported by Rainer Orth <ro@gcc.gnu.org> */
 
 /* { dg-do run } */
+/* { dg-options "-std=c99" } */
 
 #include <stdarg.h>