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-rw-r--r--include/ruby/3/attr/error.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/ruby/3/attr/error.h b/include/ruby/3/attr/error.h
index ee5e3290ae..53628259a0 100644
--- a/include/ruby/3/attr/error.h
+++ b/include/ruby/3/attr/error.h
@@ -20,6 +20,7 @@
* extension libraries. They could be written in C++98.
* @brief Defines #RUBY3_ATTR_ERROR.
*/
+#include "ruby/3/has/attribute.h"
/** Wraps (or simulates) `__attribute__((error))` */
#if RUBY3_HAS_ATTRIBUTE(error)