diff --git a/arch/avr/src/avr/Toolchain.defs b/arch/avr/src/avr/Toolchain.defs
index c6508b68442..d5bff2a09e9 100644
--- a/arch/avr/src/avr/Toolchain.defs
+++ b/arch/avr/src/avr/Toolchain.defs
@@ -80,8 +80,6 @@ else ifeq ($(CONFIG_ARCH_CHIP_AT90USB1287),y)
 else ifeq ($(CONFIG_ARCH_CHIP_ATMEGA2560),y)
   ARCHCPUFLAGS += -mmcu=atmega2560
   LDFLAGS += -mavr6
-else
-  $(error "No valid CONFIG_ARCH_CHIP_ set in the configuration")
 endif
 
 ifeq ($(CONFIG_DEBUG_CUSTOMOPT),y)
diff --git a/arch/sparc/src/sparc_v8/Toolchain.defs b/arch/sparc/src/sparc_v8/Toolchain.defs
index 98c7e943b17..96c02e1d68e 100644
--- a/arch/sparc/src/sparc_v8/Toolchain.defs
+++ b/arch/sparc/src/sparc_v8/Toolchain.defs
@@ -52,8 +52,6 @@ ifeq ($(CONFIG_ARCH_CHIP_BM3803),y)
   ARCHCPUFLAGS += -mcpu=leon
 else ifeq ($(CONFIG_ARCH_CHIP_BM3823),y)
   ARCHCPUFLAGS += -mcpu=leon -mflat
-else
-  $(error "No valid CONFIG_ARCH_CHIP_ set in the configuration")
 endif
 
 ifeq ($(CONFIG_DEBUG_CUSTOMOPT),y)