diff --git a/src/TinyGsmClientA6.h b/src/TinyGsmClientA6.h
index 3561d9b..4205438 100644
--- a/src/TinyGsmClientA6.h
+++ b/src/TinyGsmClientA6.h
@@ -610,8 +610,7 @@ 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 461f378..fc33258 100644
--- a/src/TinyGsmClientBG96.h
+++ b/src/TinyGsmClientBG96.h
@@ -670,8 +670,7 @@ 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 e6cfaa4..9014437 100644
--- a/src/TinyGsmClientESP8266.h
+++ b/src/TinyGsmClientESP8266.h
@@ -480,8 +480,7 @@ 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 9889180..0bc0f20 100644
--- a/src/TinyGsmClientM590.h
+++ b/src/TinyGsmClientM590.h
@@ -626,8 +626,7 @@ 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/TinyGsmClientM95.h b/src/TinyGsmClientM95.h
index c3df0db..0151d60 100644
--- a/src/TinyGsmClientM95.h
+++ b/src/TinyGsmClientM95.h
@@ -722,8 +722,7 @@ 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/TinyGsmClientMC60.h b/src/TinyGsmClientMC60.h
index beff53f..8928c41 100644
--- a/src/TinyGsmClientMC60.h
+++ b/src/TinyGsmClientMC60.h
@@ -844,8 +844,7 @@ 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 a692d27..126552e 100644
--- a/src/TinyGsmClientUBLOX.h
+++ b/src/TinyGsmClientUBLOX.h
@@ -687,8 +687,7 @@ 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()) {