diff --git a/tools/net/sunrpc/xdrgen/templates/C/pointer/encoder/string.j2 b/tools/net/sunrpc/xdrgen/templates/C/pointer/encoder/string.j2
index cf65b71eaef3..7ddc2bf3edac 100644
--- a/tools/net/sunrpc/xdrgen/templates/C/pointer/encoder/string.j2
+++ b/tools/net/sunrpc/xdrgen/templates/C/pointer/encoder/string.j2
@@ -2,7 +2,9 @@
 {% if annotate %}
 	/* member {{ name }} (variable-length string) */
 {% endif %}
+{% if maxsize != "0" %}
 	if (value->{{ name }}.len > {{ maxsize }})
 		return false;
+{% endif %}
 	if (xdr_stream_encode_opaque(xdr, value->{{ name }}.data, value->{{ name }}.len) < 0)
 		return false;
diff --git a/tools/net/sunrpc/xdrgen/templates/C/pointer/encoder/variable_length_opaque.j2 b/tools/net/sunrpc/xdrgen/templates/C/pointer/encoder/variable_length_opaque.j2
index 1d477c2d197a..5bf00070ae95 100644
--- a/tools/net/sunrpc/xdrgen/templates/C/pointer/encoder/variable_length_opaque.j2
+++ b/tools/net/sunrpc/xdrgen/templates/C/pointer/encoder/variable_length_opaque.j2
@@ -2,7 +2,9 @@
 {% if annotate %}
 	/* member {{ name }} (variable-length opaque) */
 {% endif %}
+{% if maxsize != "0" %}
 	if (value->{{ name }}.len > {{ maxsize }})
 		return false;
+{% endif %}
 	if (xdr_stream_encode_opaque(xdr, value->{{ name }}.data, value->{{ name }}.len) < 0)
 		return false;
diff --git a/tools/net/sunrpc/xdrgen/templates/C/struct/encoder/string.j2 b/tools/net/sunrpc/xdrgen/templates/C/struct/encoder/string.j2
index cf65b71eaef3..7ddc2bf3edac 100644
--- a/tools/net/sunrpc/xdrgen/templates/C/struct/encoder/string.j2
+++ b/tools/net/sunrpc/xdrgen/templates/C/struct/encoder/string.j2
@@ -2,7 +2,9 @@
 {% if annotate %}
 	/* member {{ name }} (variable-length string) */
 {% endif %}
+{% if maxsize != "0" %}
 	if (value->{{ name }}.len > {{ maxsize }})
 		return false;
+{% endif %}
 	if (xdr_stream_encode_opaque(xdr, value->{{ name }}.data, value->{{ name }}.len) < 0)
 		return false;
diff --git a/tools/net/sunrpc/xdrgen/templates/C/struct/encoder/variable_length_opaque.j2 b/tools/net/sunrpc/xdrgen/templates/C/struct/encoder/variable_length_opaque.j2
index 1d477c2d197a..5bf00070ae95 100644
--- a/tools/net/sunrpc/xdrgen/templates/C/struct/encoder/variable_length_opaque.j2
+++ b/tools/net/sunrpc/xdrgen/templates/C/struct/encoder/variable_length_opaque.j2
@@ -2,7 +2,9 @@
 {% if annotate %}
 	/* member {{ name }} (variable-length opaque) */
 {% endif %}
+{% if maxsize != "0" %}
 	if (value->{{ name }}.len > {{ maxsize }})
 		return false;
+{% endif %}
 	if (xdr_stream_encode_opaque(xdr, value->{{ name }}.data, value->{{ name }}.len) < 0)
 		return false;