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-rw-r--r--tool/m4/ruby_dtrace_available.m42
1 files changed, 1 insertions, 1 deletions
diff --git a/tool/m4/ruby_dtrace_available.m4 b/tool/m4/ruby_dtrace_available.m4
index babffaffac..e03b7762fc 100644
--- a/tool/m4/ruby_dtrace_available.m4
+++ b/tool/m4/ruby_dtrace_available.m4
@@ -1,4 +1,4 @@
-# -*- Autoconf -*-
+dnl -*- Autoconf -*-
AC_DEFUN([RUBY_DTRACE_AVAILABLE],
[AC_CACHE_CHECK(whether dtrace USDT is available, rb_cv_dtrace_available,
[