diff --git a/configure.ac b/configure.ac
index 5899f2aa9c..639b392368 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2757,6 +2757,9 @@ AS_CASE([$coroutine_type], [yes|''], [
         [aarch64-openbsd*], [
             coroutine_type=arm64
         ],
+        [riscv64-openbsd*], [
+            coroutine_type=riscv64
+        ],
         [*-openbsd*], [
             coroutine_type=pthread
         ],