diff --git a/src/TinyGsmClientA6.h b/src/TinyGsmClientA6.h
index 2769395..bad5e09 100644
--- a/src/TinyGsmClientA6.h
+++ b/src/TinyGsmClientA6.h
@@ -689,8 +689,7 @@ public:
     streamWrite(tail...);
   }
 
-  bool streamSkipUntil(char c) {
-    const unsigned long timeout = 1000L;
+  bool streamSkipUntil(char c, const unsigned long timeout = 1000L) {
     unsigned long startMillis = millis();
     while (millis() - startMillis < timeout) {
       while (millis() - startMillis < timeout && !stream.available()) {
diff --git a/src/TinyGsmClientBG96.h b/src/TinyGsmClientBG96.h
index 5616dae..b68ba87 100644
--- a/src/TinyGsmClientBG96.h
+++ b/src/TinyGsmClientBG96.h
@@ -698,8 +698,7 @@ public:
     streamWrite(tail...);
   }
 
-  bool streamSkipUntil(char c) {
-    const unsigned long timeout = 1000L;
+  bool streamSkipUntil(char c, const unsigned long timeout = 1000L) {
     unsigned long startMillis = millis();
     while (millis() - startMillis < timeout) {
       while (millis() - startMillis < timeout && !stream.available()) {
diff --git a/src/TinyGsmClientESP8266.h b/src/TinyGsmClientESP8266.h
index 51c18ec..62c9ece 100644
--- a/src/TinyGsmClientESP8266.h
+++ b/src/TinyGsmClientESP8266.h
@@ -477,8 +477,7 @@ public:
     streamWrite(tail...);
   }
 
-  bool streamSkipUntil(char c) {
-    const unsigned long timeout = 1000L;
+  bool streamSkipUntil(char c, const unsigned long timeout = 1000L) {
     unsigned long startMillis = millis();
     while (millis() - startMillis < timeout) {
       while (millis() - startMillis < timeout && !stream.available()) {
diff --git a/src/TinyGsmClientM590.h b/src/TinyGsmClientM590.h
index cd04c71..564c574 100644
--- a/src/TinyGsmClientM590.h
+++ b/src/TinyGsmClientM590.h
@@ -635,8 +635,7 @@ public:
     streamWrite(tail...);
   }
 
-  bool streamSkipUntil(char c) {
-    const unsigned long timeout = 1000L;
+  bool streamSkipUntil(char c, const unsigned long timeout = 1000L) {
     unsigned long startMillis = millis();
     while (millis() - startMillis < timeout) {
       while (millis() - startMillis < timeout && !stream.available()) {
diff --git a/src/TinyGsmClientUBLOX.h b/src/TinyGsmClientUBLOX.h
index 929d1c3..f7d9c87 100644
--- a/src/TinyGsmClientUBLOX.h
+++ b/src/TinyGsmClientUBLOX.h
@@ -697,8 +697,7 @@ public:
     streamWrite(tail...);
   }
 
-  bool streamSkipUntil(char c) {
-    const unsigned long timeout = 1000L;
+  bool streamSkipUntil(char c, const unsigned long timeout = 1000L) {
     unsigned long startMillis = millis();
     while (millis() - startMillis < timeout) {
       while (millis() - startMillis < timeout && !stream.available()) {