diff --git a/programs/fuzz/fuzz_server.c b/programs/fuzz/fuzz_server.c
index 006239c..014f386 100644
--- a/programs/fuzz/fuzz_server.c
+++ b/programs/fuzz/fuzz_server.c
@@ -9,7 +9,9 @@
 #include <stdint.h>
 
 
-#ifdef MBEDTLS_SSL_SRV_C
+#if defined(MBEDTLS_SSL_SRV_C) && \
+    defined(MBEDTLS_ENTROPY_C) && \
+    defined(MBEDTLS_CTR_DRBG_C)
 const char *pers = "fuzz_server";
 static int initialized = 0;
 #if defined(MBEDTLS_X509_CRT_PARSE_C) && defined(MBEDTLS_PEM_PARSE_C)
@@ -25,11 +27,13 @@
 };
 const char psk_id[] = "Client_identity";
 #endif
-#endif // MBEDTLS_SSL_SRV_C
+#endif // MBEDTLS_SSL_SRV_C && MBEDTLS_ENTROPY_C && MBEDTLS_CTR_DRBG_C
 
 
 int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
-#ifdef MBEDTLS_SSL_SRV_C
+#if defined(MBEDTLS_SSL_SRV_C) && \
+    defined(MBEDTLS_ENTROPY_C) && \
+    defined(MBEDTLS_CTR_DRBG_C)
     int ret;
     size_t len;
     mbedtls_ssl_context ssl;
@@ -179,7 +183,7 @@
 #else
     (void) Data;
     (void) Size;
-#endif //MBEDTLS_SSL_SRV_C
+#endif /* MBEDTLS_SSL_SRV_C && MBEDTLS_ENTROPY_C && MBEDTLS_CTR_DRBG_C */
 
     return 0;
 }