diff --git a/Libraries/PeriphDrivers/Source/UART/uart_ai87.c b/Libraries/PeriphDrivers/Source/UART/uart_ai87.c
index dfba30bef2..b9ff550bc4 100644
--- a/Libraries/PeriphDrivers/Source/UART/uart_ai87.c
+++ b/Libraries/PeriphDrivers/Source/UART/uart_ai87.c
@@ -141,6 +141,11 @@ int MXC_UART_SetFrequency(mxc_uart_regs_t *uart, unsigned int baud, mxc_uart_clo
         return E_BAD_PARAM;
     }
 
+    // Default OSR
+    //  Setting LPUART Over-Sampling Rate in MXC_UART_RevB_SetFrequency function overwrites
+    //  the sampling rate set below for the ERTCO.
+    uart->osr = 5;
+
     unsigned int input_clock_freq = 0;
     switch (clock) {
     case MXC_UART_APB_CLK:
diff --git a/Libraries/PeriphDrivers/Source/UART/uart_me12.c b/Libraries/PeriphDrivers/Source/UART/uart_me12.c
index 23d9f751db..c685f50fd6 100644
--- a/Libraries/PeriphDrivers/Source/UART/uart_me12.c
+++ b/Libraries/PeriphDrivers/Source/UART/uart_me12.c
@@ -110,6 +110,9 @@ int MXC_UART_SetFrequency(mxc_uart_regs_t *uart, unsigned int baud, mxc_uart_clo
         return E_BAD_PARAM;
     }
 
+    // Default OSR
+    uart->osr = 5;
+
     switch (clock) {
     case MXC_UART_APB_CLK:
         clock_freq = SystemCoreClock / 2;
diff --git a/Libraries/PeriphDrivers/Source/UART/uart_me30.c b/Libraries/PeriphDrivers/Source/UART/uart_me30.c
index a54f77099d..9963fa8479 100644
--- a/Libraries/PeriphDrivers/Source/UART/uart_me30.c
+++ b/Libraries/PeriphDrivers/Source/UART/uart_me30.c
@@ -113,6 +113,9 @@ int MXC_UART_SetFrequency(mxc_uart_regs_t *uart, unsigned int baud, mxc_uart_clo
         return E_BAD_PARAM;
     }
 
+    // Default OSR
+    uart->osr = 5;
+
     switch (clock) {
     case MXC_UART_APB_CLK:
         clock_freq = PeripheralClock;
diff --git a/Libraries/PeriphDrivers/Source/UART/uart_me55.c b/Libraries/PeriphDrivers/Source/UART/uart_me55.c
index d04def93cf..4662b16a09 100644
--- a/Libraries/PeriphDrivers/Source/UART/uart_me55.c
+++ b/Libraries/PeriphDrivers/Source/UART/uart_me55.c
@@ -127,6 +127,9 @@ int MXC_UART_SetFrequency(mxc_uart_regs_t *uart, unsigned int baud, mxc_uart_clo
         return E_BAD_PARAM;
     }
 
+    // Default OSR
+    uart->osr = 5;
+
     switch (clock) {
     case MXC_UART_APB_CLK:
         clock_freq = SystemCoreClock / 2;