diff --git a/arch/arm/src/stm32/stm32_spi.c b/arch/arm/src/stm32/stm32_spi.c
index 8a636f4d2f9..c2cb1d81db6 100644
--- a/arch/arm/src/stm32/stm32_spi.c
+++ b/arch/arm/src/stm32/stm32_spi.c
@@ -2120,7 +2120,6 @@ FAR struct spi_dev_s *stm32_spibus_initialize(int bus)
 #endif
     {
       spierr("ERROR: Unsupported SPI bus: %d\n", bus);
-      return NULL;
     }
 
   leave_critical_section(flags);
diff --git a/arch/arm/src/stm32f0l0g0/stm32_spi.c b/arch/arm/src/stm32f0l0g0/stm32_spi.c
index fb782f19ab2..2e728e6ee2d 100644
--- a/arch/arm/src/stm32f0l0g0/stm32_spi.c
+++ b/arch/arm/src/stm32f0l0g0/stm32_spi.c
@@ -1778,7 +1778,6 @@ FAR struct spi_dev_s *stm32_spibus_initialize(int bus)
 #endif
     {
       spierr("ERROR: Unsupported SPI bus: %d\n", bus);
-      return NULL;
     }
 
   leave_critical_section(flags);
diff --git a/arch/arm/src/stm32f7/stm32_spi.c b/arch/arm/src/stm32f7/stm32_spi.c
index 8fbbaa23f97..bc8bb0875aa 100644
--- a/arch/arm/src/stm32f7/stm32_spi.c
+++ b/arch/arm/src/stm32f7/stm32_spi.c
@@ -2178,7 +2178,6 @@ FAR struct spi_dev_s *stm32_spibus_initialize(int bus)
 #endif
     {
       spierr("ERROR: Unsupported SPI bus: %d\n", bus);
-      return NULL;
     }
 
   leave_critical_section(flags);
diff --git a/arch/arm/src/stm32h7/stm32_spi.c b/arch/arm/src/stm32h7/stm32_spi.c
index c1b9026b09a..b84ed1c72df 100644
--- a/arch/arm/src/stm32h7/stm32_spi.c
+++ b/arch/arm/src/stm32h7/stm32_spi.c
@@ -2279,7 +2279,6 @@ FAR struct spi_dev_s *stm32_spibus_initialize(int bus)
 #endif
     {
       spierr("ERROR: Unsupported SPI bus: %d\n", bus);
-      return NULL;
     }
 
   leave_critical_section(flags);