diff --git a/arch/arm/src/stm32/stm32_i2c_alt.c b/arch/arm/src/stm32/stm32_i2c_alt.c
index 9112b084076..ca64656d8c7 100644
--- a/arch/arm/src/stm32/stm32_i2c_alt.c
+++ b/arch/arm/src/stm32/stm32_i2c_alt.c
@@ -1867,7 +1867,6 @@ static int stm32_i2c_isr(struct stm32_i2c_priv_s *priv)
 #else
       /* Clear all interrupts */
 
-      uint32_t regval;
       regval  = stm32_i2c_getreg(priv, STM32_I2C_CR2_OFFSET);
       regval &= ~I2C_CR2_ALLINTS;
       stm32_i2c_putreg(priv, STM32_I2C_CR2_OFFSET, regval);