diff --git a/src/lte/model/eps-bearer.cc b/src/lte/model/eps-bearer.cc
index ae9e59be4..afb53a42b 100644
--- a/src/lte/model/eps-bearer.cc
+++ b/src/lte/model/eps-bearer.cc
@@ -27,7 +27,20 @@
 namespace ns3 {
 
 
+GbrQosInformation::GbrQosInformation ()
+  : gbrDl (0),
+    gbrUl (0),
+    mbrDl (0),
+    mbrUl (0)
+{
+}
 
+AllocationRetentionPriority::AllocationRetentionPriority ()
+  : priorityLevel (0),
+    preemptionCapability (false),
+    preemptionVulnerability (false)
+{
+}
 
 EpsBearer::EpsBearer ()
 {
diff --git a/src/lte/model/eps-bearer.h b/src/lte/model/eps-bearer.h
index a4f5f0e34..3aae02f67 100644
--- a/src/lte/model/eps-bearer.h
+++ b/src/lte/model/eps-bearer.h
@@ -32,6 +32,11 @@ namespace ns3 {
  */
 struct GbrQosInformation
 {
+  /** 
+   * Default constructor, inizializes member variables to zero or equivalent
+   */
+  GbrQosInformation ();
+
   uint64_t gbrDl;  /**< Guaranteed Bit Rate (bit/s) in downlink */
   uint64_t gbrUl;  /**< Guaranteed Bit Rate (bit/s) in uplink */
   uint64_t mbrDl;  /**< Maximum Bit Rate (bit/s) in downlink */
@@ -45,6 +50,10 @@ struct GbrQosInformation
  */
 struct AllocationRetentionPriority
 {
+  /** 
+   * Default constructor, inizializes member variables to zero or equivalent
+   */
+  AllocationRetentionPriority ();
   uint8_t priorityLevel;     // /< 1-15; 1 = highest
   bool preemprionCapability; // /< true if bearer can preempt others
   bool preemprionVulnerability; // true if bearer can be preempted by others