diff --git a/wolfcrypt/src/asn.c b/wolfcrypt/src/asn.c
index 1863c2b81..6618a93f0 100644
--- a/wolfcrypt/src/asn.c
+++ b/wolfcrypt/src/asn.c
@@ -9000,16 +9000,24 @@ static int SignCert(int requestSz, int sType, byte* buffer, word32 buffSz,
 
     /* locate ctx */
     if (rsaKey) {
+    #ifndef NO_RSA
     #ifdef WOLFSSL_ASYNC_CRYPT
         certSignCtx = &rsaKey->certSignCtx;
     #endif
         heap = rsaKey->heap;
+    #else
+        return NOT_COMPILED_IN;
+    #endif /* NO_RSA */
     }
     else if (eccKey) {
+    #ifdef HAVE_ECC
     #ifdef WOLFSSL_ASYNC_CRYPT
         certSignCtx = &eccKey->certSignCtx;
     #endif
         heap = eccKey->heap;
+    #else
+        return NOT_COMPILED_IN;
+    #endif /* HAVE_ECC */
     }
 
 #ifdef WOLFSSL_ASYNC_CRYPT