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-rw-r--r--ext/raindrops/extconf.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/ext/raindrops/extconf.rb b/ext/raindrops/extconf.rb
index 86c7d78..7570f24 100644
--- a/ext/raindrops/extconf.rb
+++ b/ext/raindrops/extconf.rb
@@ -112,6 +112,7 @@ EOF
 end
 
 have_func("getpagesize", "unistd.h")
+have_func('rb_thread_call_without_gvl')
 have_func('rb_thread_blocking_region')
 have_func('rb_thread_io_blocking_region')