diff --git a/include/sigar.h b/include/sigar.h
index 065e3482..edfd6e15 100644
--- a/include/sigar.h
+++ b/include/sigar.h
@@ -491,7 +491,8 @@ typedef struct {
         tx_dropped,
         tx_overruns,
         tx_collisions,
-        tx_carrier;
+        tx_carrier,
+        speed;
 } sigar_net_interface_stat_t;
 
 SIGAR_DECLARE(int)
diff --git a/src/os/aix/aix_sigar.c b/src/os/aix/aix_sigar.c
index 0c0470db..4d312c50 100644
--- a/src/os/aix/aix_sigar.c
+++ b/src/os/aix/aix_sigar.c
@@ -2140,6 +2140,8 @@ int sigar_net_interface_stat_get(sigar_t *sigar, const char *name,
         ifstat->tx_collisions = data.if_collisions;
         ifstat->tx_carrier    = SIGAR_FIELD_NOTIMPL;
 
+        ifstat->speed         = SIGAR_FIELD_NOTIMPL;
+
         return SIGAR_OK;
     }
 
diff --git a/src/os/darwin/darwin_sigar.c b/src/os/darwin/darwin_sigar.c
index 76180013..2d4fe1f3 100644
--- a/src/os/darwin/darwin_sigar.c
+++ b/src/os/darwin/darwin_sigar.c
@@ -1840,6 +1840,8 @@ int sigar_net_interface_stat_get(sigar_t *sigar, const char *name,
     ifstat->tx_overruns   = SIGAR_FIELD_NOTIMPL;
     ifstat->tx_carrier    = SIGAR_FIELD_NOTIMPL;
 
+    ifstat->speed         = SIGAR_FIELD_NOTIMPL;
+
     return SIGAR_OK;
 }
 
diff --git a/src/os/hpux/hpux_sigar.c b/src/os/hpux/hpux_sigar.c
index 8719857c..b298d475 100644
--- a/src/os/hpux/hpux_sigar.c
+++ b/src/os/hpux/hpux_sigar.c
@@ -786,6 +786,8 @@ int sigar_net_interface_stat_get(sigar_t *sigar, const char *name,
     ifstat->tx_collisions = SIGAR_FIELD_NOTIMPL;
     ifstat->tx_carrier    = SIGAR_FIELD_NOTIMPL;
 
+    ifstat->speed         = SIGAR_FIELD_NOTIMPL;
+
     return SIGAR_OK;
 }
 
diff --git a/src/os/linux/linux_sigar.c b/src/os/linux/linux_sigar.c
index 22aeb1d8..329373bd 100644
--- a/src/os/linux/linux_sigar.c
+++ b/src/os/linux/linux_sigar.c
@@ -1625,6 +1625,9 @@ int sigar_net_interface_stat_get(sigar_t *sigar, const char *name,
         ifstat->tx_overruns   = sigar_strtoul(ptr);
         ifstat->tx_collisions = sigar_strtoul(ptr);
         ifstat->tx_carrier    = sigar_strtoul(ptr);
+
+        ifstat->speed         = SIGAR_FIELD_NOTIMPL;
+
         break;
     }
 
diff --git a/src/os/netware/netware_sigar.c b/src/os/netware/netware_sigar.c
index 2ee9e6ce..bf7a556b 100644
--- a/src/os/netware/netware_sigar.c
+++ b/src/os/netware/netware_sigar.c
@@ -391,6 +391,8 @@ int sigar_net_interface_stat_get(sigar_t *sigar, const char *name,
     ifstat->tx_collisions = -1;
     ifstat->tx_carrier    = -1;
 
+    ifstat->speed         = SIGAR_FIELD_NOTIMPL;
+
     return SIGAR_OK;
 }
 
diff --git a/src/os/osf1/osf1_sigar.c b/src/os/osf1/osf1_sigar.c
index 8ab8ddfa..4c54b815 100644
--- a/src/os/osf1/osf1_sigar.c
+++ b/src/os/osf1/osf1_sigar.c
@@ -522,6 +522,8 @@ int sigar_net_interface_stat_get(sigar_t *sigar, const char *name,
     ifstat->tx_collisions = SIGAR_FIELD_NOTIMPL;
     ifstat->tx_carrier    = SIGAR_FIELD_NOTIMPL;
 
+    ifstat->speed         = SIGAR_FIELD_NOTIMPL;
+
     return SIGAR_OK;
 }
 
diff --git a/src/os/solaris/solaris_sigar.c b/src/os/solaris/solaris_sigar.c
index 9bbd089f..21196a4b 100644
--- a/src/os/solaris/solaris_sigar.c
+++ b/src/os/solaris/solaris_sigar.c
@@ -1944,6 +1944,8 @@ static int sigar_net_ifstat_get_any(sigar_t *sigar, const char *name,
 int sigar_net_interface_stat_get(sigar_t *sigar, const char *name,
                                  sigar_net_interface_stat_t *ifstat)
 {
+    ifstat->speed = SIGAR_FIELD_NOTIMPL;
+
     switch (*name) {
       case 'd':
         if (strnEQ(name, "dmfe", 4)) {
diff --git a/src/os/stub/stub_sigar.c b/src/os/stub/stub_sigar.c
index cc80a59c..e6d7ef7b 100644
--- a/src/os/stub/stub_sigar.c
+++ b/src/os/stub/stub_sigar.c
@@ -251,6 +251,7 @@ int sigar_net_interface_stat_get(sigar_t *sigar, const char *name,
     ifstat->tx_overruns   = -1;
     ifstat->tx_collisions = -1;
     ifstat->tx_carrier    = -1;
+    ifstat->speed         = -1;
 
     return SIGAR_OK;
 }
diff --git a/src/os/win32/win32_sigar.c b/src/os/win32/win32_sigar.c
index 050331a4..77081fcd 100644
--- a/src/os/win32/win32_sigar.c
+++ b/src/os/win32/win32_sigar.c
@@ -2018,6 +2018,8 @@ sigar_net_interface_stat_get(sigar_t *sigar, const char *name,
     ifstat->tx_collisions = SIGAR_FIELD_NOTIMPL;
     ifstat->tx_carrier    = SIGAR_FIELD_NOTIMPL;
 
+    ifstat->speed         = ifr->dwSpeed;
+
     return SIGAR_OK;
 }