diff --git a/vars/build.vars b/vars/build.vars
index aaf0b20..91b8dc7 100644
--- a/vars/build.vars
+++ b/vars/build.vars
@@ -60,11 +60,11 @@ HOST_TOOLCHAIN_DEPS_PREFIX="${PREFIX_CROSS}";
 : ${PKG_MPFR_HOST_SHA256SUM:=79c73f60af010a30a5c27a955a1d2d01ba095b72537dab0ecaad57f5a7bb1b6b};
 : ${PKG_MPFR_HOST_VERSION:=3.1.2};
 : ${PKG_MPFR_HOST_URL:=ftp://ftp.gnu.org/gnu/mpfr/mpfr-${PKG_MPFR_HOST_VERSION}.tar.bz2};
-: ${PKG_MPFR_HOST_CONFIGURE_ARGS_EXTRA:=--with-gmp=${PREFIX_NATIVE}};
+: ${PKG_MPFR_HOST_CONFIGURE_ARGS_EXTRA:=--with-gmp=${PREFIX_CROSS}};
 : ${PKG_MPC_HOST_SHA256SUM:=ed5a815cfea525dc778df0cb37468b9c1b554aaf30d9328b1431ca705b7400ff};
 : ${PKG_MPC_HOST_VERSION:=1.0.1};
 : ${PKG_MPC_HOST_URL:=ftp://ftp.gnu.org/gnu/mpc/mpc-${PKG_MPC_HOST_VERSION}.tar.gz};
-: ${PKG_MPC_HOST_CONFIGURE_ARGS_EXTRA:=--with-gmp=${PREFIX_NATIVE} --with-mpfr=${PREFIX_NATIVE}};
+: ${PKG_MPC_HOST_CONFIGURE_ARGS_EXTRA:=--with-gmp=${PREFIX_CROSS} --with-mpfr=${PREFIX_CROSS}};
 : ${PKG_PSXTYPES_HOST_URLS_GIT:=psxtypes=${DEFAULT_GITROOT}/psxtypes};
 : ${PKG_PSXTYPES_HOST_BUILD_STEPS_DISABLE:=build};
 : ${PKG_PSXTYPES_HOST_IN_TREE:=1};