diff --git a/src/TinyGsmClientA6.h b/src/TinyGsmClientA6.h
index a552c43..d354653 100644
--- a/src/TinyGsmClientA6.h
+++ b/src/TinyGsmClientA6.h
@@ -500,7 +500,7 @@ TINY_GSM_MODEM_WAIT_FOR_NETWORK()
     return res;
   }
 
-  uint8_t getBattChargeState()
+  uint8_t getBattChargeState() {
     sendAT(GF("+CBC?"));
     if (waitResponse(GF(GSM_NL "+CBC:")) != 1) {
       return false;
diff --git a/src/TinyGsmClientBG96.h b/src/TinyGsmClientBG96.h
index 3cbe153..66a5058 100644
--- a/src/TinyGsmClientBG96.h
+++ b/src/TinyGsmClientBG96.h
@@ -467,7 +467,7 @@ TINY_GSM_MODEM_GET_GPRS_IP_CONNECTED()
     return res;
   }
 
-  uint8_t getBattChargeState()
+  uint8_t getBattChargeState() {
     sendAT(GF("+CBC?"));
     if (waitResponse(GF(GSM_NL "+CBC:")) != 1) {
       return false;
diff --git a/src/TinyGsmClientM95.h b/src/TinyGsmClientM95.h
index 6fe2885..2fcb25a 100644
--- a/src/TinyGsmClientM95.h
+++ b/src/TinyGsmClientM95.h
@@ -515,7 +515,7 @@ TINY_GSM_MODEM_GET_GPRS_IP_CONNECTED()
     return res;
   }
 
-  uint8_t getBattChargeState()
+  uint8_t getBattChargeState() {
     sendAT(GF("+CBC?"));
     if (waitResponse(GF(GSM_NL "+CBC:")) != 1) {
       return false;
diff --git a/src/TinyGsmClientMC60.h b/src/TinyGsmClientMC60.h
index 4f06c97..33afb7c 100644
--- a/src/TinyGsmClientMC60.h
+++ b/src/TinyGsmClientMC60.h
@@ -534,7 +534,7 @@ TINY_GSM_MODEM_GET_GPRS_IP_CONNECTED()
     return res;
   }
 
-  uint8_t getBattChargeState()
+  uint8_t getBattChargeState() {
     sendAT(GF("+CBC?"));
     if (waitResponse(GF(GSM_NL "+CBC:")) != 1) {
       return false;
diff --git a/src/TinyGsmClientSIM7000.h b/src/TinyGsmClientSIM7000.h
index 5f8e9ac..e1c0008 100644
--- a/src/TinyGsmClientSIM7000.h
+++ b/src/TinyGsmClientSIM7000.h
@@ -755,7 +755,7 @@ TINY_GSM_MODEM_WAIT_FOR_NETWORK()
     return res;
   }
 
-  uint8_t getBattChargeState()
+  uint8_t getBattChargeState() {
     sendAT(GF("+CBC?"));
     if (waitResponse(GF(GSM_NL "+CBC:")) != 1) {
       return false;
diff --git a/src/TinyGsmClientSIM800.h b/src/TinyGsmClientSIM800.h
index 4c80fcb..c6f72c0 100644
--- a/src/TinyGsmClientSIM800.h
+++ b/src/TinyGsmClientSIM800.h
@@ -678,7 +678,7 @@ TINY_GSM_MODEM_WAIT_FOR_NETWORK()
     return res;
   }
 
-  uint8_t getBattChargeState()
+  uint8_t getBattChargeState() {
     sendAT(GF("+CBC?"));
     if (waitResponse(GF(GSM_NL "+CBC:")) != 1) {
       return false;