diff --git a/.gitignore b/.gitignore
index d6c65dba..3f4c5193 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,6 +12,9 @@ vgcore.*
 /libuv.so
 /libuv.dylib
 
+# Generated by dtrace(1) when doing an in-tree build.
+/src/unix/uv-dtrace.h
+
 /out/
 /build/gyp