diff --git a/arch/Config.in.x86 b/arch/Config.in.x86
index 4beb11662d..0aae26799c 100644
--- a/arch/Config.in.x86
+++ b/arch/Config.in.x86
@@ -196,6 +196,7 @@ config BR2_x86_westmere
 	select BR2_X86_CPU_HAS_SSSE3
 	select BR2_X86_CPU_HAS_SSE4
 	select BR2_X86_CPU_HAS_SSE42
+	select BR2_ARCH_NEEDS_GCC_AT_LEAST_4_9
 config BR2_x86_corei7_avx
 	bool "corei7-avx"
 	select BR2_X86_CPU_HAS_MMX
@@ -273,6 +274,7 @@ config BR2_x86_silvermont
 	select BR2_X86_CPU_HAS_SSSE3
 	select BR2_X86_CPU_HAS_SSE4
 	select BR2_X86_CPU_HAS_SSE42
+	select BR2_ARCH_NEEDS_GCC_AT_LEAST_4_9
 config BR2_x86_k6
 	bool "k6"
 	depends on !BR2_x86_64