diff --git a/rules.mk b/rules.mk
index 56129917e45..d9d38374fa8 100644
--- a/rules.mk
+++ b/rules.mk
@@ -132,7 +132,7 @@ endif
 LIBRPC=-lrpc
 LIBRPC_DEPENDS=+librpc
 
-ifneq ($(findstring $(ARCH) , mips64 x86_64 ),)
+ifeq ($(CONFIG_ARCH_64BIT),y)
   LIB_SUFFIX:=64
 endif
 
diff --git a/target/Config.in b/target/Config.in
index 79a91b1afb3..8ff89ff8a9a 100644
--- a/target/Config.in
+++ b/target/Config.in
@@ -70,6 +70,9 @@ config HAS_MIPS16
 	depends (mips || mipsel || mips64 || mips64el)
 	bool
 
+config ARCH_64BIT
+	bool
+
 # Architecture selection
 
 config arm
@@ -104,9 +107,11 @@ config mipsel
 
 config mips64
 	select BIG_ENDIAN
+	select ARCH_64BIT
 	bool
 
 config mips64el
+	select ARCH_64BIT
 	bool
 
 config powerpc
@@ -115,6 +120,7 @@ config powerpc
 
 config powerpc64
 	select BIG_ENDIAN
+	select ARCH_64BIT
 	bool
 
 config sh3
@@ -136,6 +142,7 @@ config sparc
 	bool
 
 config x86_64
+	select ARCH_64BIT
 	bool
 
 config ARCH
diff --git a/toolchain/gcc/final/Makefile b/toolchain/gcc/final/Makefile
index a667266a096..e8c32f629dc 100644
--- a/toolchain/gcc/final/Makefile
+++ b/toolchain/gcc/final/Makefile
@@ -35,7 +35,7 @@ define CleanupToolchain
 	ln -sf ../include $(TOOLCHAIN_DIR)/$(REAL_GNU_TARGET_NAME)/sys-include
 	rm -rf $(TOOLCHAIN_DIR)/$(REAL_GNU_TARGET_NAME)/lib
 	ln -sf ../lib $(TOOLCHAIN_DIR)/$(REAL_GNU_TARGET_NAME)/lib
-	$(if $(CONFIG_mips64)$(CONFIG_mips64el)$(CONFIG_x86_64),ln -sf ../lib64 $(TOOLCHAIN_DIR)/$(REAL_GNU_TARGET_NAME)/lib64)
+	$(if $(CONFIG_ARCH_64BIT),ln -sf ../lib64 $(TOOLCHAIN_DIR)/$(REAL_GNU_TARGET_NAME)/lib64)
 endef
 
 define Host/Configure