diff --git a/src/demangle_unittest.cc b/src/demangle_unittest.cc
index f3aa2dd..02425d1 100644
--- a/src/demangle_unittest.cc
+++ b/src/demangle_unittest.cc
@@ -31,6 +31,8 @@
 //
 // Unit tests for functions in demangle.c.
 
+#include "utilities.h"
+
 #include <iostream>
 #include <fstream>
 #include <string>
diff --git a/src/stacktrace_unittest.cc b/src/stacktrace_unittest.cc
index 4270f93..0acd2c9 100644
--- a/src/stacktrace_unittest.cc
+++ b/src/stacktrace_unittest.cc
@@ -27,10 +27,11 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+#include "utilities.h"
+
 #include <stdio.h>
 #include <stdlib.h>
 #include "config.h"
-#include "utilities.h"
 #include "base/commandlineflags.h"
 #include "glog/logging.h"
 #include "stacktrace.h"
diff --git a/src/stl_logging_unittest.cc b/src/stl_logging_unittest.cc
index 021f642..0ed4695 100644
--- a/src/stl_logging_unittest.cc
+++ b/src/stl_logging_unittest.cc
@@ -27,6 +27,7 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+#include "utilities.h"
 #include "config.h"
 
 #ifdef HAVE_USING_OPERATOR