diff --git a/.github/workflows/os-check.yml b/.github/workflows/os-check.yml
index 4068d34f5..9d1761673 100644
--- a/.github/workflows/os-check.yml
+++ b/.github/workflows/os-check.yml
@@ -64,6 +64,7 @@ jobs:
           '--enable-dtls --enable-dtls13 --enable-ocspstapling --enable-ocspstapling2
            --enable-cert-setup-cb --enable-sessioncerts',
           '--disable-sni --disable-ecc --disable-tls13 --disable-secure-renegotiation-info',
+          'CPPFLAGS=-DWOLFSSL_BLIND_PRIVATE_KEY',
         ]
     name: make check
     if: github.repository_owner == 'wolfssl'