diff --git a/src/buildings/test/reference/buildings_pathloss.m b/src/buildings/test/reference/buildings_pathloss.m
index 0f550a488..5b0bd362e 100644
--- a/src/buildings/test/reference/buildings_pathloss.m
+++ b/src/buildings/test/reference/buildings_pathloss.m
@@ -46,7 +46,7 @@ disp ("Test #3: the value of Kun 2.6 GHz is:"), disp (g)
 % Test #4
 d = 1041.2; %m
 f = 2114e6;
-g = loss_ITU1411_LOS (d, hb, hm, hr, f);
+g = loss_ITU1411_LOS (d, hb, hm, f);
 disp ("Test #4: the value of ITU1411 in LOS is:"), disp (g)
 
 % Test #5
diff --git a/src/lte/test/reference/lte_pathloss.m b/src/lte/test/reference/lte_pathloss.m
index 98c232777..3ebec1694 100644
--- a/src/lte/test/reference/lte_pathloss.m
+++ b/src/lte/test/reference/lte_pathloss.m
@@ -21,7 +21,7 @@ b = 50;
 st_w = 20;
 phi = 45;
 big = 1; % metropolitan centre
-g = loss_ITU1411_LOS (d, hb, hm, hr, f);
+g = loss_ITU1411_LOS (d, hb, hm, f);
 printf ("Test #11: the value of ITU1411 in LOS is: %f\n", g);
 
 d = d = 500.84;
diff --git a/src/propagation/model/itu-r-1411-los-propagation-loss-model.cc b/src/propagation/model/itu-r-1411-los-propagation-loss-model.cc
index 1da9afc98..e4b9a7313 100644
--- a/src/propagation/model/itu-r-1411-los-propagation-loss-model.cc
+++ b/src/propagation/model/itu-r-1411-los-propagation-loss-model.cc
@@ -81,7 +81,7 @@ void
 ItuR1411LosPropagationLossModel::SetFrequency (double freq)
 {
   NS_ASSERT (freq > 0.0);
-  m_lambda = 300000000 / freq;
+  m_lambda = 299792458.0 / freq;
 }
 
 
diff --git a/src/propagation/model/itu-r-1411-nlos-over-rooftop-propagation-loss-model.cc b/src/propagation/model/itu-r-1411-nlos-over-rooftop-propagation-loss-model.cc
index 57f1d3338..76652f9d2 100644
--- a/src/propagation/model/itu-r-1411-nlos-over-rooftop-propagation-loss-model.cc
+++ b/src/propagation/model/itu-r-1411-nlos-over-rooftop-propagation-loss-model.cc
@@ -208,7 +208,7 @@ void
 ItuR1411NlosOverRooftopPropagationLossModel::SetFrequency (double freq)
 {
   m_frequency = freq;
-  m_lambda = 300000000 / freq;
+  m_lambda = 299792458.0 / freq;
 }
 
 
diff --git a/src/propagation/test/reference/loss_ITU1411_LOS.m b/src/propagation/test/reference/loss_ITU1411_LOS.m
index a1bb8dba5..f37739aa9 100644
--- a/src/propagation/test/reference/loss_ITU1411_LOS.m
+++ b/src/propagation/test/reference/loss_ITU1411_LOS.m
@@ -1,7 +1,7 @@
-function g = loss_ITU1411_LOS (d, hb, hm, hr, f)
+function g = loss_ITU1411_LOS (d, hb, hm, f)
 
   %%
-  %% function g = loss_ITU1411_LOS(d, hb, hm, hr, f)
+  %% function g = loss_ITU1411_LOS(d, hb, hm, f)
   %%
   %% returns the loss at d meters for f frequency and mobile height m and
   %% base station height of hb
@@ -10,7 +10,7 @@ function g = loss_ITU1411_LOS (d, hb, hm, hr, f)
   assert(f > 0);
 
 
-  lambda = 300000000.0 / f;
+  lambda = 299792458 / f;
   Lbp = abs(20*log10(lambda^2/(8*pi*hb*hm)));
   Rbp = (4*hb*hm) / lambda;
   if (d<=Rbp)
diff --git a/src/propagation/test/reference/loss_ITU1411_NLOS_over_rooftop.m b/src/propagation/test/reference/loss_ITU1411_NLOS_over_rooftop.m
index 371c80653..c80fe1284 100644
--- a/src/propagation/test/reference/loss_ITU1411_NLOS_over_rooftop.m
+++ b/src/propagation/test/reference/loss_ITU1411_NLOS_over_rooftop.m
@@ -10,7 +10,7 @@ function g = loss_ITU1411_NLOS_over_rooftop (d, hb, hm, hr, f, l, b, st_w, phi,
   assert(f > 0);
 
 
-  lambda = 300000000.0 / f;
+  lambda = 299792458 / f;
   fmhz = f/1e6;
   Dhb = hb - hr;
   ds = (lambda*d*d)/(Dhb*Dhb);