diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 427ffaedc3c823..ab7430d6cfd710 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -22,6 +22,9 @@ jobs:
           # arm 32-bit gcc not yet supported
           - arch: arm
             toolchain: gcc
+          # riscv64 debug (see #500 and #502).
+          - arch: riscv64
+            config: debug
           # Exclude `LLVM=1` where not supported.
           - arch: ppc64le
             toolchain: llvm