diff --git a/sysdeps/unix/sysv/linux/mips/ftruncate64.c b/sysdeps/unix/sysv/linux/mips/ftruncate64.c
index 66c6548ee8..768946e9fa 100644
--- a/sysdeps/unix/sysv/linux/mips/ftruncate64.c
+++ b/sysdeps/unix/sysv/linux/mips/ftruncate64.c
@@ -33,7 +33,8 @@ extern int __have_no_truncate64;
 #endif
 
 /* The order of hight, low depends on endianness.  */
-extern int __syscall_ftruncate64 (int fd, int high_length, int low_length);
+extern int __syscall_ftruncate64 (int fd, int dummy, int high_length,
+				  int low_length);
 
 
 /* Truncate the file FD refers to to LENGTH bytes.  */
diff --git a/sysdeps/unix/sysv/linux/mips/truncate64.c b/sysdeps/unix/sysv/linux/mips/truncate64.c
index 08d9667612..bcdb9ddf98 100644
--- a/sysdeps/unix/sysv/linux/mips/truncate64.c
+++ b/sysdeps/unix/sysv/linux/mips/truncate64.c
@@ -33,7 +33,8 @@ int __have_no_truncate64;
 #endif
 
 /* The order of hight, low depends on endianness.  */
-extern int __syscall_truncate64 (const char *path, int high_length, int low_length);
+extern int __syscall_truncate64 (const char *path, int dummy,
+				 int high_length, int low_length);
 
 
 /* Truncate the file FD refers to to LENGTH bytes.  */