--- third_party/crashpad/crashpad/util/linux/ptracer.cc
+++ third_party/crashpad/crashpad/util/linux/ptracer.cc
@@ -26,6 +26,7 @@
 
 #if defined(ARCH_CPU_X86_FAMILY)
 #include <asm/ldt.h>
+#include <asm/ptrace-abi.h>
 #endif
 
 namespace crashpad {