diff --git a/arch/arm/src/efm32/efm32_serial.c b/arch/arm/src/efm32/efm32_serial.c
index 89ad73b64c..7d474e54a1 100644
--- a/arch/arm/src/efm32/efm32_serial.c
+++ b/arch/arm/src/efm32/efm32_serial.c
@@ -836,7 +836,7 @@ static int efm32_ioctl(struct file *filep, int cmd, unsigned long arg)
 
         termiosp->c_cflag = CS8;
 
-        /* TODO: PARENB, PARODD, CSTOPB, CCTS_IFLOW, CCTS_OFLOW */
+        /* TODO: PARENB, PARODD, CSTOPB, CRTS_IFLOW, CCTS_OFLOW */
 
         cfsetispeed(termiosp, priv->config->baud);
       }
@@ -867,7 +867,7 @@ static int efm32_ioctl(struct file *filep, int cmd, unsigned long arg)
             break;
           }
 
-        /* TODO : PARENB, PARODD, CSTOPB, CCTS_OFLOW, CCTS_IFLOW */
+        /* TODO : PARENB, PARODD, CSTOPB, CCTS_OFLOW, CRTS_IFLOW */
 
 #if 0
         if (termiosp->c_cflag & PARENB)
diff --git a/arch/arm/src/gd32f4/gd32f4xx_serial.c b/arch/arm/src/gd32f4/gd32f4xx_serial.c
index fdebe29ed9..a444464f93 100644
--- a/arch/arm/src/gd32f4/gd32f4xx_serial.c
+++ b/arch/arm/src/gd32f4/gd32f4xx_serial.c
@@ -1840,7 +1840,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
 
         cfsetispeed(termiosp, priv->baud);
 
-        /* TODO: CCTS_IFLOW, CCTS_OFLOW */
+        /* TODO: CRTS_IFLOW, CCTS_OFLOW */
       }
       break;
 
diff --git a/arch/arm/src/kinetis/kinetis_lpserial.c b/arch/arm/src/kinetis/kinetis_lpserial.c
index 3b3b85e6f2..4aa0d388b0 100644
--- a/arch/arm/src/kinetis/kinetis_lpserial.c
+++ b/arch/arm/src/kinetis/kinetis_lpserial.c
@@ -1204,7 +1204,7 @@ static int kinetis_ioctl(struct file *filep, int cmd, unsigned long arg)
 
         cfsetispeed(termiosp, priv->baud);
 
-        /* TODO: CCTS_IFLOW, CCTS_OFLOW */
+        /* TODO: CRTS_IFLOW, CCTS_OFLOW */
       }
       break;
 
diff --git a/arch/arm/src/kinetis/kinetis_serial.c b/arch/arm/src/kinetis/kinetis_serial.c
index 9b8bf07b29..7767147abd 100644
--- a/arch/arm/src/kinetis/kinetis_serial.c
+++ b/arch/arm/src/kinetis/kinetis_serial.c
@@ -1361,7 +1361,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
 
         cfsetispeed(termiosp, priv->baud);
 
-        /* TODO: CCTS_IFLOW, CCTS_OFLOW */
+        /* TODO: CRTS_IFLOW, CCTS_OFLOW */
       }
       break;
 
diff --git a/arch/arm/src/stm32/stm32_serial.c b/arch/arm/src/stm32/stm32_serial.c
index 04d53c5037..0742c92337 100644
--- a/arch/arm/src/stm32/stm32_serial.c
+++ b/arch/arm/src/stm32/stm32_serial.c
@@ -2327,7 +2327,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
 
         cfsetispeed(termiosp, priv->baud);
 
-        /* TODO: CCTS_IFLOW, CCTS_OFLOW */
+        /* TODO: CRTS_IFLOW, CCTS_OFLOW */
       }
       break;
 
diff --git a/arch/arm/src/stm32f0l0g0/stm32_serial_v1.c b/arch/arm/src/stm32f0l0g0/stm32_serial_v1.c
index 36234f5a83..b6cd9e6d9b 100644
--- a/arch/arm/src/stm32f0l0g0/stm32_serial_v1.c
+++ b/arch/arm/src/stm32f0l0g0/stm32_serial_v1.c
@@ -1670,7 +1670,7 @@ static int stm32serial_ioctl(struct file *filep, int cmd,
 #endif
           CS8;
 
-        /* TODO: CCTS_IFLOW, CCTS_OFLOW */
+        /* TODO: CRTS_IFLOW, CCTS_OFLOW */
       }
       break;
 
diff --git a/arch/arm/src/stm32f0l0g0/stm32_serial_v2.c b/arch/arm/src/stm32f0l0g0/stm32_serial_v2.c
index c0a5abca7e..ee3ba1558b 100644
--- a/arch/arm/src/stm32f0l0g0/stm32_serial_v2.c
+++ b/arch/arm/src/stm32f0l0g0/stm32_serial_v2.c
@@ -1315,7 +1315,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
 #endif
           CS8;
 
-        /* TODO: CCTS_IFLOW, CCTS_OFLOW */
+        /* TODO: CRTS_IFLOW, CCTS_OFLOW */
       }
       break;
 
diff --git a/arch/arm/src/stm32f7/stm32_serial.c b/arch/arm/src/stm32f7/stm32_serial.c
index e05e2fefa6..ee2027a8b7 100644
--- a/arch/arm/src/stm32f7/stm32_serial.c
+++ b/arch/arm/src/stm32f7/stm32_serial.c
@@ -2586,7 +2586,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
 
         cfsetispeed(termiosp, priv->baud);
 
-        /* TODO: CCTS_IFLOW, CCTS_OFLOW */
+        /* TODO: CRTS_IFLOW, CCTS_OFLOW */
       }
       break;
 
diff --git a/arch/arm/src/stm32h7/stm32_serial.c b/arch/arm/src/stm32h7/stm32_serial.c
index 8f1d1b82a3..f1035c8f0e 100644
--- a/arch/arm/src/stm32h7/stm32_serial.c
+++ b/arch/arm/src/stm32h7/stm32_serial.c
@@ -2782,7 +2782,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
 
         cfsetispeed(termiosp, priv->baud);
 
-        /* TODO: CCTS_IFLOW, CCTS_OFLOW */
+        /* TODO: CRTS_IFLOW, CCTS_OFLOW */
       }
       break;
 
diff --git a/arch/arm/src/stm32l4/stm32l4_serial.c b/arch/arm/src/stm32l4/stm32l4_serial.c
index 8e8530e23e..ef04854896 100644
--- a/arch/arm/src/stm32l4/stm32l4_serial.c
+++ b/arch/arm/src/stm32l4/stm32l4_serial.c
@@ -2152,7 +2152,7 @@ static int stm32l4serial_ioctl(struct file *filep, int cmd,
 
         cfsetispeed(termiosp, priv->baud);
 
-        /* TODO: CCTS_IFLOW, CCTS_OFLOW */
+        /* TODO: CRTS_IFLOW, CCTS_OFLOW */
       }
       break;
 
diff --git a/arch/arm/src/stm32l5/stm32l5_serial.c b/arch/arm/src/stm32l5/stm32l5_serial.c
index 8794982958..6b57caaf1b 100644
--- a/arch/arm/src/stm32l5/stm32l5_serial.c
+++ b/arch/arm/src/stm32l5/stm32l5_serial.c
@@ -2092,7 +2092,7 @@ static int stm32l5serial_ioctl(struct file *filep, int cmd,
 #endif
           CS8;
 
-        /* TODO: CCTS_IFLOW, CCTS_OFLOW */
+        /* TODO: CRTS_IFLOW, CCTS_OFLOW */
       }
       break;
 
diff --git a/arch/arm/src/stm32u5/stm32_serial.c b/arch/arm/src/stm32u5/stm32_serial.c
index 20029d9342..e0122d46e8 100644
--- a/arch/arm/src/stm32u5/stm32_serial.c
+++ b/arch/arm/src/stm32u5/stm32_serial.c
@@ -2092,7 +2092,7 @@ static int stm32serial_ioctl(struct file *filep, int cmd,
 #endif
           CS8;
 
-        /* TODO: CCTS_IFLOW, CCTS_OFLOW */
+        /* TODO: CRTS_IFLOW, CCTS_OFLOW */
       }
       break;
 
diff --git a/arch/arm/src/stm32wb/stm32wb_serial.c b/arch/arm/src/stm32wb/stm32wb_serial.c
index 7015f5de73..dd6a6ef810 100644
--- a/arch/arm/src/stm32wb/stm32wb_serial.c
+++ b/arch/arm/src/stm32wb/stm32wb_serial.c
@@ -1773,7 +1773,7 @@ static int stm32wb_serial_ioctl(struct file *filep, int cmd,
 
         cfsetispeed(termiosp, priv->baud);
 
-        /* TODO: CCTS_IFLOW, CCTS_OFLOW */
+        /* TODO: CRTS_IFLOW, CCTS_OFLOW */
       }
       break;
 
diff --git a/arch/arm/src/stm32wl5/stm32wl5_serial.c b/arch/arm/src/stm32wl5/stm32wl5_serial.c
index e23bad5c77..8d087aeaeb 100644
--- a/arch/arm/src/stm32wl5/stm32wl5_serial.c
+++ b/arch/arm/src/stm32wl5/stm32wl5_serial.c
@@ -1847,7 +1847,7 @@ static int stm32wl5serial_ioctl(struct file *filep, int cmd,
 #endif
           CS8;
 
-        /* TODO: CCTS_IFLOW, CCTS_OFLOW */
+        /* TODO: CRTS_IFLOW, CCTS_OFLOW */
       }
       break;