diff --git a/programs/fuzz/fuzz_x509crl.c b/programs/fuzz/fuzz_x509crl.c
index fbfdfe821..15affb59b 100644
--- a/programs/fuzz/fuzz_x509crl.c
+++ b/programs/fuzz/fuzz_x509crl.c
@@ -15,6 +15,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
     }
 #else
     ((void) ret);
+    ((void) buf);
 #endif /* !MBEDTLS_X509_REMOVE_INFO */
     mbedtls_x509_crl_free( &crl );
 #else
diff --git a/programs/fuzz/fuzz_x509crt.c b/programs/fuzz/fuzz_x509crt.c
index 7d274a8be..dbc153c49 100644
--- a/programs/fuzz/fuzz_x509crt.c
+++ b/programs/fuzz/fuzz_x509crt.c
@@ -15,6 +15,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
     }
 #else
     ((void) ret);
+    ((void) buf);
 #endif /* !MBEDTLS_X509_REMOVE_INFO */
     mbedtls_x509_crt_free( &crt );
 #else
diff --git a/programs/fuzz/fuzz_x509csr.c b/programs/fuzz/fuzz_x509csr.c
index 9c21412b0..a270742a9 100644
--- a/programs/fuzz/fuzz_x509csr.c
+++ b/programs/fuzz/fuzz_x509csr.c
@@ -15,6 +15,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
     }
 #else
     ((void) ret);
+    ((void) buf);
 #endif /* !MBEDTLS_X509_REMOVE_INFO */
     mbedtls_x509_csr_free( &csr );
 #else