diff --git a/tools/debug/ptrace.c b/tools/debug/ptrace.c
index e3f24ab..48a7356 100644
--- a/tools/debug/ptrace.c
+++ b/tools/debug/ptrace.c
@@ -48,7 +48,8 @@
 typedef struct _DebuggerDebug PtraceDebug;
 
 /* platform */
-#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__)
+#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__linux__) \
+	|| defined(__NetBSD__)
 typedef int ptrace_data_t;
 #endif