diff --git a/cc/config/mips64_device.go b/cc/config/mips64_device.go
index 35fa55100..e05dbf182 100644
--- a/cc/config/mips64_device.go
+++ b/cc/config/mips64_device.go
@@ -28,8 +28,6 @@ var (
 		"-fomit-frame-pointer",
 		"-fno-strict-aliasing",
 		"-funswitch-loops",
-		"-U__unix",
-		"-U__unix__",
 		"-Umips",
 		"-ffunction-sections",
 		"-fdata-sections",
diff --git a/cc/config/mips_device.go b/cc/config/mips_device.go
index d154426db..78e95b6f2 100644
--- a/cc/config/mips_device.go
+++ b/cc/config/mips_device.go
@@ -28,8 +28,6 @@ var (
 		"-fomit-frame-pointer",
 		"-fno-strict-aliasing",
 		"-funswitch-loops",
-		"-U__unix",
-		"-U__unix__",
 		"-Umips",
 		"-ffunction-sections",
 		"-fdata-sections",