diff --git a/util/crossgcc/buildgcc b/util/crossgcc/buildgcc
index b78b141..e0b4ed4 100755
--- a/util/crossgcc/buildgcc
+++ b/util/crossgcc/buildgcc
@@ -615,6 +615,12 @@
 	if $CC -v 2>&1 | grep -q LLVM; then
 		CC=llvm-gcc
 	fi
+elif [ $UNAME = "Linux" ]; then
+	# gmp is overeager with detecting 64bit CPUs even if they run
+	# a 32bit kernel and userland.
+	if [ "$(uname -m 2>/dev/null)" = "i686" ]; then
+		OPTIONS="ABI=32"
+	fi
 fi
 fi # GCC