diff --git a/examples/wireless/wifi-eht-network.cc b/examples/wireless/wifi-eht-network.cc
index 407107712..d8859e6bd 100644
--- a/examples/wireless/wifi-eht-network.cc
+++ b/examples/wireless/wifi-eht-network.cc
@@ -311,6 +311,11 @@ main(int argc, char* argv[])
 
     int minChannelWidth = 20;
     int maxChannelWidth = (frequency != 2.4 && frequency2 != 2.4 && frequency3 != 2.4) ? 160 : 40;
+    if ((channelWidth != -1) &&
+        ((channelWidth < minChannelWidth) || (channelWidth > maxChannelWidth)))
+    {
+        NS_FATAL_ERROR("Invalid channel width: " << channelWidth << " MHz");
+    }
     if (channelWidth >= minChannelWidth && channelWidth <= maxChannelWidth)
     {
         minChannelWidth = channelWidth;
diff --git a/examples/wireless/wifi-he-network.cc b/examples/wireless/wifi-he-network.cc
index 407d39442..6adf989b9 100644
--- a/examples/wireless/wifi-he-network.cc
+++ b/examples/wireless/wifi-he-network.cc
@@ -206,6 +206,11 @@ main(int argc, char* argv[])
 
     int minChannelWidth = 20;
     int maxChannelWidth = frequency == 2.4 ? 40 : 160;
+    if ((channelWidth != -1) &&
+        ((channelWidth < minChannelWidth) || (channelWidth > maxChannelWidth)))
+    {
+        NS_FATAL_ERROR("Invalid channel width: " << channelWidth << " MHz");
+    }
     if (channelWidth >= minChannelWidth && channelWidth <= maxChannelWidth)
     {
         minChannelWidth = channelWidth;
diff --git a/examples/wireless/wifi-ht-network.cc b/examples/wireless/wifi-ht-network.cc
index 701652053..40488472d 100644
--- a/examples/wireless/wifi-ht-network.cc
+++ b/examples/wireless/wifi-ht-network.cc
@@ -135,6 +135,11 @@ main(int argc, char* argv[])
 
     int minChannelWidth = 20;
     int maxChannelWidth = 40;
+    if ((channelWidth != -1) &&
+        ((channelWidth < minChannelWidth) || (channelWidth > maxChannelWidth)))
+    {
+        NS_FATAL_ERROR("Invalid channel width: " << channelWidth << " MHz");
+    }
     if (channelWidth >= minChannelWidth && channelWidth <= maxChannelWidth)
     {
         minChannelWidth = channelWidth;
diff --git a/examples/wireless/wifi-vht-network.cc b/examples/wireless/wifi-vht-network.cc
index 8790760f5..2ffd92197 100644
--- a/examples/wireless/wifi-vht-network.cc
+++ b/examples/wireless/wifi-vht-network.cc
@@ -148,6 +148,11 @@ main(int argc, char* argv[])
 
     int minChannelWidth = 20;
     int maxChannelWidth = 160;
+    if ((channelWidth != -1) &&
+        ((channelWidth < minChannelWidth) || (channelWidth > maxChannelWidth)))
+    {
+        NS_FATAL_ERROR("Invalid channel width: " << channelWidth << " MHz");
+    }
     if (channelWidth >= minChannelWidth && channelWidth <= maxChannelWidth)
     {
         minChannelWidth = channelWidth;