diff --git a/arch/arm/src/stm32/stm32_1wire.c b/arch/arm/src/stm32/stm32_1wire.c
index 44f9f68d31..cc728312d4 100644
--- a/arch/arm/src/stm32/stm32_1wire.c
+++ b/arch/arm/src/stm32/stm32_1wire.c
@@ -981,15 +981,12 @@ static int stm32_1wire_isr(int irq, void *context, void *arg)
               stm32_1wire_send(priv, READ_TX);
               break;
 
-            case ONEWIRETASK_WRITEBIT:
-              *priv->byte = 0;
-              priv->msgs = NULL;
-              priv->result = OK;
-              nxsem_post(&priv->sem_isr);
-              break;
-
             case ONEWIRETASK_READBIT:
               *priv->byte = (dr == READ_RX1) ? 1 : 0;
+
+              /* Fall through */
+
+            case ONEWIRETASK_WRITEBIT:
               priv->msgs = NULL;
               priv->result = OK;
               nxsem_post(&priv->sem_isr);
diff --git a/arch/arm/src/stm32l4/stm32l4_1wire.c b/arch/arm/src/stm32l4/stm32l4_1wire.c
index 2892f08e71..b884cd57b2 100644
--- a/arch/arm/src/stm32l4/stm32l4_1wire.c
+++ b/arch/arm/src/stm32l4/stm32l4_1wire.c
@@ -906,15 +906,12 @@ static int stm32_1wire_isr(int irq, void *context, void *arg)
               stm32_1wire_send(priv, READ_TX);
               break;
 
-            case ONEWIRETASK_WRITEBIT:
-              *priv->byte = 0;
-              priv->msgs = NULL;
-              priv->result = OK;
-              nxsem_post(&priv->sem_isr);
-              break;
-
             case ONEWIRETASK_READBIT:
               *priv->byte = (dr == READ_RX1) ? 1 : 0;
+
+              /* Fall through */
+
+            case ONEWIRETASK_WRITEBIT:
               priv->msgs = NULL;
               priv->result = OK;
               nxsem_post(&priv->sem_isr);