diff --git a/include/mbedtls/config.h b/include/mbedtls/config.h
index 3f82acb..aa6b597 100644
--- a/include/mbedtls/config.h
+++ b/include/mbedtls/config.h
@@ -3200,6 +3200,22 @@
  */
 //#define MBEDTLS_SSL_CID_OUT_LEN_MAX 32
 
+/** \def MBEDTLS_SSL_CID_PADDING_GRANULARITY
+ *
+ * This option controls the use of record plaintext padding
+ * when using the Connection ID extension in DTLS 1.2.
+ *
+ * The padding will always be chosen so that the length of the
+ * padded plaintext is a multiple of the value of this option.
+ *
+ * Note: A value of \c 1 means that no padding will be used
+ *       for outgoing records.
+ *
+ * The value MUST be a power of 2.
+ *
+ */
+//#define MBEDTLS_SSL_CID_PADDING_GRANULARITY 16
+
 /** \def MBEDTLS_SSL_OUT_CONTENT_LEN
  *
  * Maximum length (in bytes) of outgoing plaintext fragments.
diff --git a/include/mbedtls/ssl.h b/include/mbedtls/ssl.h
index d8a5a84..20f55af 100644
--- a/include/mbedtls/ssl.h
+++ b/include/mbedtls/ssl.h
@@ -266,6 +266,10 @@
 #define MBEDTLS_SSL_CID_OUT_LEN_MAX         32
 #endif
 
+#if !defined(MBEDTLS_SSL_CID_PADDING_GRANULARITY)
+#define MBEDTLS_SSL_CID_PADDING_GRANULARITY 16
+#endif
+
 /* \} name SECTION: Module settings */
 
 /*
diff --git a/include/mbedtls/ssl_internal.h b/include/mbedtls/ssl_internal.h
index 03b914b..03c2d74 100644
--- a/include/mbedtls/ssl_internal.h
+++ b/include/mbedtls/ssl_internal.h
@@ -167,9 +167,7 @@
 #endif
 
 #if defined(MBEDTLS_SSL_CID)
-#define MBEDTLS_SSL_MAX_CID_EXPANSION       16 /* Currently, we pad records
-                                                * to lengths which are multiples
-                                                * of 16 Bytes. */
+#define MBEDTLS_SSL_MAX_CID_EXPANSION      MBEDTLS_SSL_CID_PADDING_GRANULARITY
 #else
 #define MBEDTLS_SSL_MAX_CID_EXPANSION        0
 #endif
diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index 6711fd2..eb332b8 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -1591,7 +1591,9 @@
                                           uint8_t rec_type )
 {
     size_t len = *content_size;
-    size_t pad = ~len & 0xF; /* Pad to a multiple of 16 */
+
+    /* MBEDTLS_SSL_CID_PADDING_GRANULARITY must be a power of 2. */
+    size_t pad = ~len & ( MBEDTLS_SSL_CID_PADDING_GRANULARITY - 1 );
 
     /* Write real content type */
     if( remaining == 0 )
diff --git a/programs/ssl/query_config.c b/programs/ssl/query_config.c
index 6c76f47..2423856 100644
--- a/programs/ssl/query_config.c
+++ b/programs/ssl/query_config.c
@@ -2450,6 +2450,14 @@
     }
 #endif /* MBEDTLS_SSL_CID_OUT_LEN_MAX */
 
+#if defined(MBEDTLS_SSL_CID_PADDING_GRANULARITY)
+    if( strcmp( "MBEDTLS_SSL_CID_PADDING_GRANULARITY", config ) == 0 )
+    {
+        MACRO_EXPANSION_TO_STR( MBEDTLS_SSL_CID_PADDING_GRANULARITY );
+        return( 0 );
+    }
+#endif /* MBEDTLS_SSL_CID_PADDING_GRANULARITY */
+
 #if defined(MBEDTLS_SSL_OUT_CONTENT_LEN)
     if( strcmp( "MBEDTLS_SSL_OUT_CONTENT_LEN", config ) == 0 )
     {