diff --git a/tools/Makefile b/tools/Makefile
index 81c69b404f..768f8786c6 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -9,7 +9,11 @@
 curdir:=tools
 
 # subdirectories to descend into
-$(curdir)/builddirs := sed sstrip ipkg-utils genext2fs squashfs mtd-utils lzma mkimage firmware-utils patch-cmdline pkg-config automake $(if $(CONFIG_CCACHE),ccache) bison $(if $(CONFIG_powerpc),dtc) lua quilt autoconf gmp mpfr
+$(curdir)/builddirs := sed sstrip ipkg-utils genext2fs squashfs mtd-utils lzma mkimage firmware-utils patch-cmdline pkg-config automake $(if $(CONFIG_CCACHE),ccache) bison $(if $(CONFIG_powerpc),dtc) lua quilt autoconf
+
+ifeq ($(CONFIG_GCC_VERSION_4_3_1)$(CONFIG_GCC_VERSION_4_3_2),y)
+$(curdir)/builddirs += gmp mpfr
+endif
 
 # builddir dependencies
 $(curdir)/squashfs/compile := $(curdir)/lzma/install