diff --git a/libc/kernel/common/linux/backing-dev.h b/libc/kernel/common/linux/backing-dev.h
index 2024bdc..d3335f9 100644
--- a/libc/kernel/common/linux/backing-dev.h
+++ b/libc/kernel/common/linux/backing-dev.h
@@ -49,7 +49,7 @@
 #define BDI_CAP_WRITE_MAP 0x00000020
 #define BDI_CAP_EXEC_MAP 0x00000040
 #define BDI_CAP_VMFLAGS   (BDI_CAP_READ_MAP | BDI_CAP_WRITE_MAP | BDI_CAP_EXEC_MAP)
-#if defined(VM_MAYREAD) && BDI_CAP_READ_MAP != (VM_MAYREAD || BDI_CAP_WRITE_MAP != (VM_MAYWRITE || BDI_CAP_EXEC_MAP != VM_MAYEXEC))
+#if defined(VM_MAYREAD) && (BDI_CAP_READ_MAP != VM_MAYREAD || BDI_CAP_WRITE_MAP != VM_MAYWRITE || BDI_CAP_EXEC_MAP != VM_MAYEXEC)
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #error please change backing_dev_info::capabilities flags
 #endif