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-rw-r--r--tool/m4/ruby_check_header.m42
1 files changed, 1 insertions, 1 deletions
diff --git a/tool/m4/ruby_check_header.m4 b/tool/m4/ruby_check_header.m4
index 171455549e..6fec9d16c5 100644
--- a/tool/m4/ruby_check_header.m4
+++ b/tool/m4/ruby_check_header.m4
@@ -3,6 +3,6 @@ AC_DEFUN([RUBY_CHECK_HEADER],
[# RUBY_CHECK_HEADER($@)
save_CPPFLAGS="$CPPFLAGS"
CPPFLAGS="$CPPFLAGS m4_if([$5], [], [$INCFLAGS], [$5])"
- AC_CHECK_HEADER([$1], [$2], [$3], [$4])
+ AC_CHECK_HEADERS([$1], [$2], [$3], [$4])
CPPFLAGS="$save_CPPFLAGS"
unset save_CPPFLAGS])