diff --git a/src/TinyGsmClientBG96.h b/src/TinyGsmClientBG96.h
index 19d9976..e1eb09c 100644
--- a/src/TinyGsmClientBG96.h
+++ b/src/TinyGsmClientBG96.h
@@ -552,7 +552,7 @@ protected:
     }
     waitResponse();
     DBG("### READ:", len, "from", mux);
-    sockets[mux]->sock_available = modemGetAvailable();
+    sockets[mux]->sock_available = modemGetAvailable(mux);
     return len;
   }
 
diff --git a/src/TinyGsmClientSaraR4.h b/src/TinyGsmClientSaraR4.h
index a8aa3db..247b920 100644
--- a/src/TinyGsmClientSaraR4.h
+++ b/src/TinyGsmClientSaraR4.h
@@ -613,7 +613,7 @@ protected:
     streamSkipUntil('\"');
     waitResponse();
     DBG("### READ:", len, "from", mux);
-    sockets[mux]->sock_available = modemGetAvailable();
+    sockets[mux]->sock_available = modemGetAvailable(mux);
     return len;
   }
 
diff --git a/src/TinyGsmClientUBLOX.h b/src/TinyGsmClientUBLOX.h
index d3fb6e3..08e3015 100644
--- a/src/TinyGsmClientUBLOX.h
+++ b/src/TinyGsmClientUBLOX.h
@@ -601,7 +601,7 @@ protected:
     streamSkipUntil('\"');
     waitResponse();
     DBG("### READ:", len, "from", mux);
-    sockets[mux]->sock_available = modemGetAvailable();
+    sockets[mux]->sock_available = modemGetAvailable(mux);
     return len;
   }