diff --git a/configure.ac b/configure.ac
index 056626362..4984d8cf1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -357,6 +357,7 @@ case $host in
      OBJCXXFLAGS="-std=c++11 $CXXFLAGS"
      ;;
    *linux*)
+     TARGET_OS=linux
      LEVELDB_TARGET_FLAGS="-DOS_LINUX"
      ;;
    *)