diff --git a/src/ssl.c b/src/ssl.c
index 60971a356..51c97879c 100644
--- a/src/ssl.c
+++ b/src/ssl.c
@@ -35668,6 +35668,7 @@ static int wolfSSL_RSA_To_Der(WOLFSSL_RSA* rsa, byte** outBuf, int publicKey, vo
         }
     }
 
+    (void)heap; /* unused if memory is disabled */
     WOLFSSL_LEAVE("wolfSSL_RSA_To_Der", derSz);
     return derSz;
 }
@@ -46850,10 +46851,18 @@ int wolfSSL_CRYPTO_set_mem_functions(
         wolfSSL_Realloc_cb r,
         wolfSSL_Free_cb    f)
 {
+#ifdef USE_WOLFSSL_MEMORY
     if (wolfSSL_SetAllocators(m, f, r) == 0)
         return WOLFSSL_SUCCESS;
     else
         return WOLFSSL_FAILURE;
+#else
+    (void)m;
+    (void)r;
+    (void)f;
+    WOLFSSL_MSG("wolfSSL allocator callback functions not compiled in");
+    return WOLFSSL_FAILURE;
+#endif
 }
 
 #if defined(WOLFSSL_KEY_GEN) && !defined(HAVE_SELFTEST)
diff --git a/wolfcrypt/src/rsa.c b/wolfcrypt/src/rsa.c
index 5288f26e8..a23456320 100644
--- a/wolfcrypt/src/rsa.c
+++ b/wolfcrypt/src/rsa.c
@@ -3669,10 +3669,9 @@ int wc_RsaPSS_CheckPadding_ex2(const byte* in, word32 inSz, byte* sig,
     if (sigCheck != NULL && sigCheck != sigCheckBuf) {
         XFREE(sigCheck, heap, DYNAMIC_TYPE_RSA_BUFFER);
     }
-#else
-    (void)heap;
 #endif
 
+    (void)heap; /* unused if memory is disabled */
     return ret;
 }
 int wc_RsaPSS_CheckPadding_ex(const byte* in, word32 inSz, byte* sig,