diff --git a/skeletons/oer_encoder.c b/skeletons/oer_encoder.c
index 8a34815..0be3a78 100644
--- a/skeletons/oer_encoder.c
+++ b/skeletons/oer_encoder.c
@@ -47,23 +47,24 @@
  */
 asn_enc_rval_t
 oer_encode_to_buffer(struct asn_TYPE_descriptor_s *type_descriptor,
+                     asn_oer_constraints_t *constraints,
                      void *struct_ptr,  /* Structure to be encoded */
                      void *buffer,      /* Pre-allocated buffer */
                      size_t buffer_size /* Initial buffer size (maximum) */
                      ) {
-        enc_to_buf_arg arg;
-        asn_enc_rval_t ec;
+    enc_to_buf_arg arg;
+    asn_enc_rval_t ec;
 
-        arg.buffer = buffer;
-        arg.left = buffer_size;
+    arg.buffer = buffer;
+    arg.left = buffer_size;
 
-        ec = type_descriptor->oer_encoder(
-            type_descriptor, 0,
-            struct_ptr, /* Pointer to the destination structure */
-            encode_to_buffer_cb, &arg);
-        if(ec.encoded != -1) {
-                assert(ec.encoded == (ssize_t)(buffer_size - arg.left));
-                /* Return the encoded contents size */
-        }
-        return ec;
+    ec = type_descriptor->oer_encoder(
+        type_descriptor, constraints,
+        struct_ptr, /* Pointer to the destination structure */
+        encode_to_buffer_cb, &arg);
+    if(ec.encoded != -1) {
+        assert(ec.encoded == (ssize_t)(buffer_size - arg.left));
+        /* Return the encoded contents size */
+    }
+    return ec;
 }
diff --git a/skeletons/oer_encoder.h b/skeletons/oer_encoder.h
index 67bc47e..08d0d4c 100644
--- a/skeletons/oer_encoder.h
+++ b/skeletons/oer_encoder.h
@@ -26,6 +26,7 @@
 /* A variant of oer_encode() which encodes data into the pre-allocated buffer */
 asn_enc_rval_t oer_encode_to_buffer(
     struct asn_TYPE_descriptor_s *type_descriptor,
+    asn_oer_constraints_t *constraints,
     void *struct_ptr,  /* Structure to be encoded */
     void *buffer,      /* Pre-allocated buffer */
     size_t buffer_size /* Initial buffer size (maximum) */
diff --git a/skeletons/tests/check-OER-INTEGER.c b/skeletons/tests/check-OER-INTEGER.c
index a202180..c5591cc 100644
--- a/skeletons/tests/check-OER-INTEGER.c
+++ b/skeletons/tests/check-OER-INTEGER.c
@@ -5,6 +5,7 @@
 #include <INTEGER.h>
 
 #define CHECK_DECODE(code, a, b, c, d, e, f)    check_decode(__LINE__, code, a, b, c, d, e, f)
+#define CHECK_ROUNDTRIP(a, b, c)    check_roundtrip(__LINE__, a, b, c);
 
 static const intmax_t NoBound = -4200024;
 
@@ -12,7 +13,7 @@
 check_decode(int lineno, enum asn_dec_rval_code_e code, intmax_t control, const char *buf, size_t size, const char *dummy, intmax_t lower_bound, intmax_t upper_bound) {
     static char *code_s[] = { "RC_OK", "RC_WMORE", "RC_FAIL", "<error>" };
 
-    fprintf(stderr, "%d: buf[%d]={%d, %d, ...}\n", lineno, size,
+    fprintf(stderr, "%d: buf[%zu]={%d, %d, ...}\n", lineno, size,
             ((const uint8_t *)buf)[0],
             ((const uint8_t *)buf)[1]);
 
@@ -76,6 +77,76 @@
     fprintf(stderr, "%d: Decode result %" PRIdMAX "\n", lineno, control);
 }
 
+
+static void
+check_roundtrip(int lineno, intmax_t value, intmax_t lower_bound, intmax_t upper_bound) {
+    uint8_t tmpbuf[32];
+    size_t tmpbuf_size;
+
+    INTEGER_t *stOut = (INTEGER_t *)calloc(1, sizeof(*stOut));
+    INTEGER_t *stIn = NULL;
+    asn_enc_rval_t er;
+    asn_dec_rval_t ret;
+    struct asn_oer_constraints_s empty_constraints = {{0,0,0}, {0,0,0}};
+    struct asn_oer_constraints_s *constraints = &empty_constraints;
+    struct asn_oer_constraint_s *ct_value = &constraints->value;
+
+    /* Setup integer constraints as requested */
+    if(lower_bound == NoBound && upper_bound == NoBound) {
+        constraints = NULL;
+    } else {
+        if(lower_bound != NoBound) {
+            ct_value->flags |= AOC_HAS_LOWER_BOUND;
+            ct_value->lower_bound = lower_bound;
+        }
+        if(upper_bound != NoBound) {
+            ct_value->flags |= AOC_HAS_UPPER_BOUND;
+            ct_value->upper_bound = upper_bound;
+        }
+    }
+
+    if(asn_imax2INTEGER(stOut, value) == -1) {
+        assert(!"Unreachable");
+    }
+
+    er = oer_encode_to_buffer(&asn_DEF_INTEGER, constraints, stOut, tmpbuf,
+                              sizeof(tmpbuf));
+    if(er.encoded != -1) {
+        fprintf(stderr, "%d: oer encode failed for %s\n", lineno,
+                er.failed_type ? er.failed_type->name : "<none>");
+        assert(er.encoded != -1);
+    }
+    tmpbuf_size = er.encoded;
+
+    ret = asn_DEF_INTEGER.oer_decoder(0, &asn_DEF_INTEGER, constraints,
+                                      (void **)&stIn, tmpbuf, tmpbuf_size);
+    if(ret.code != RC_OK) {
+        /* Basic OER decode does not work */
+        fprintf(stderr, "%d: Failed oer_decode(value=%" PRIdMAX ", size=%zu)\n",
+                lineno, value, tmpbuf_size);
+        assert(ret.code == 0);
+    } else {
+        intmax_t outcome;
+        if(asn_INTEGER2imax(stIn, &outcome) != 0) {
+            /* Result of decode is structurally incorrect */
+            fprintf(stderr,
+                    "%d: Failed to convert INTEGER 2 imax; structurally "
+                    "incorrect INTEGER\n",
+                    lineno);
+            assert(!"Unreachable");
+        } else if(outcome != value) {
+            /* Decoded value is wrong */
+            fprintf(stderr,
+                    "%d: Decode result %" PRIdMAX " is not expected %" PRIdMAX
+                    "\n",
+                    lineno, outcome, value);
+            assert(outcome == value);
+        }
+    }
+
+    fprintf(stderr, "%d: Decode result %" PRIdMAX "\n", lineno, value);
+}
+
 int
 main() {
 	CHECK_DECODE(RC_WMORE, 0, "", 0, "bounds=", NoBound, NoBound);
@@ -102,4 +173,9 @@
 	CHECK_DECODE(RC_OK, -1, "\x1\xff", 2, "bounds=", NoBound, 255);
 	CHECK_DECODE(RC_WMORE, -1, "\x02\x00\xff", 2, "bounds=", NoBound, 200);
 	CHECK_DECODE(RC_OK, 255, "\x02\x00\xff", 3, "bounds=", NoBound, 200);
+
+    CHECK_ROUNDTRIP(0, NoBound, NoBound);
+    CHECK_ROUNDTRIP(1, NoBound, NoBound);
+    CHECK_ROUNDTRIP(1, -128, 127);
+
 }