diff --git a/testing/fulltests/unit-tests/T021netsnmp_sprint_realloc_no_type_clib.c b/testing/fulltests/unit-tests/T021netsnmp_sprint_realloc_no_type_clib.c
new file mode 100644
index 0000000..57793d4
--- /dev/null
+++ b/testing/fulltests/unit-tests/T021netsnmp_sprint_realloc_no_type_clib.c
@@ -0,0 +1,51 @@
+/* HEADER Test sprint_realloc_variable with -OQ */
+
+/*
+ * Check that sprint_realloc_variable does not crash when it prints
+ * a variable with NULL type, while MIG says it's different type (INTEGER, ...).
+ * We will use MIB definition of nlmLogVariableTable, which has a column
+ * for most of the MIB types.
+ */
+static oid objid[] = {
+        1, 3, 6, 1, 2, 1, 92, 1, 3, 2, 1, 4
+};
+
+u_char *buf;
+size_t buf_len, out_len;
+int buf_overflow, i;
+char mibdir[PATH_MAX];
+int ret;
+
+snprintf(mibdir, sizeof(mibdir), "%s/%s", ABS_SRCDIR, "mibs");
+netsnmp_ds_set_string(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_MIBDIRS, mibdir);
+netsnmp_ds_set_boolean(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_QUICKE_PRINT, TRUE);
+
+init_snmp("T021");
+
+netsnmp_variable_list variable;
+variable.next_variable = NULL;
+variable.name = objid;
+variable.name_length = sizeof(objid) / sizeof(objid[0]);
+variable.type = ASN_NULL;
+variable.val.integer = NULL;
+variable.val_len = 0;
+
+
+buf = NULL;
+buf_len = out_len = buf_overflow = 0;
+
+/* Try to format variable with nlmLogVariableEntry.4 - nlmLogVariableEntry.11
+ * OIDs and with NULL type.
+ */
+for (i=4; i<=11; i++) {
+    buf = NULL;
+    buf_len = out_len = buf_overflow = 0;
+    objid[11] = i;
+    ret = sprint_realloc_variable(&buf, &buf_len, &out_len, 1, objid,
+            sizeof(objid) / sizeof(objid[0]), &variable);
+    OKF(ret == 1, ("sprint_realloc_variable for %d returned %d: %s, expected 1",
+            i, ret, buf));
+    free(buf);
+}
+
+snmp_shutdown("T021");