diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 4f608d0e98e..619e6253922 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,11 @@
+2007-09-27  Richard Sandiford  <rsandifo@nildram.co.uk>
+
+	* gcc.dg/c99-tgmath-1.c: Require c99_runtime and add the associated
+	options.
+	* gcc.dg/c99-tgmath-2.c: Likewise.
+	* gcc.dg/c99-tgmath-3.c: Likewise.
+	* gcc.dg/c99-tgmath-4.c: Likewise.
+
 2007-09-27  Paul Thomas  <pault@gcc.gnu.org>
 
 	PR fortran/33568
diff --git a/gcc/testsuite/gcc.dg/c99-tgmath-1.c b/gcc/testsuite/gcc.dg/c99-tgmath-1.c
index bef6ab1b918..c7d848c7a6c 100644
--- a/gcc/testsuite/gcc.dg/c99-tgmath-1.c
+++ b/gcc/testsuite/gcc.dg/c99-tgmath-1.c
@@ -1,7 +1,8 @@
 /* Test for <tgmath.h> in C99. */
 /* Origin: Matt Austern <austern@apple.com>
-/* { dg-do preprocess } */
+/* { dg-do preprocess { target c99_runtime } } */
 /* { dg-options "-std=iso9899:1999" } */
+/* { dg-add-options c99_runtime } */
 
 /* Test that tgmath defines the macros it's supposed to. */
 #include <tgmath.h>
diff --git a/gcc/testsuite/gcc.dg/c99-tgmath-2.c b/gcc/testsuite/gcc.dg/c99-tgmath-2.c
index 22435f3f9a4..d4f1f87cfa9 100644
--- a/gcc/testsuite/gcc.dg/c99-tgmath-2.c
+++ b/gcc/testsuite/gcc.dg/c99-tgmath-2.c
@@ -1,7 +1,8 @@
 /* Test for <tgmath.h> in C99. */
 /* Origin: Matt Austern <austern@apple.com>
-/* { dg-do compile } */
+/* { dg-do compile { target c99_runtime } } */
 /* { dg-options "-std=iso9899:1999" } */
+/* { dg-add-options c99_runtime } */
 
 /* Test that invoking type-generic sin on a float invokes sinf. */
 #include <tgmath.h>
diff --git a/gcc/testsuite/gcc.dg/c99-tgmath-3.c b/gcc/testsuite/gcc.dg/c99-tgmath-3.c
index d3eaca15aee..3e983042751 100644
--- a/gcc/testsuite/gcc.dg/c99-tgmath-3.c
+++ b/gcc/testsuite/gcc.dg/c99-tgmath-3.c
@@ -1,7 +1,8 @@
 /* Test for <tgmath.h> in C99. */
 /* Origin: Matt Austern <austern@apple.com>
-/* { dg-do compile } */
+/* { dg-do compile { target c99_runtime } } */
 /* { dg-options "-std=iso9899:1999" } */
+/* { dg-add-options c99_runtime } */
 
 /* Test that invoking type-generic exp on a complex invokes cexp. */
 #include <tgmath.h>
diff --git a/gcc/testsuite/gcc.dg/c99-tgmath-4.c b/gcc/testsuite/gcc.dg/c99-tgmath-4.c
index 7d40449a773..d8dc043c261 100644
--- a/gcc/testsuite/gcc.dg/c99-tgmath-4.c
+++ b/gcc/testsuite/gcc.dg/c99-tgmath-4.c
@@ -1,7 +1,8 @@
 /* Test for <tgmath.h> in C99. */
 /* Origin: Matt Austern <austern@apple.com>
-/* { dg-do compile } */
+/* { dg-do compile { target c99_runtime } } */
 /* { dg-options "-std=iso9899:1999" } */
+/* { dg-add-options c99_runtime } */
 
 /* Test that invoking type-generic pow on complex float invokes cpowf. */
 #include <tgmath.h>