diff --git a/src/demangle_unittest.cc b/src/demangle_unittest.cc
index f3aa2dd3b14de87b88332d46d9241f00a1fa4fc2..02425d10dc40b9e430115a18ae76e433aeb60af6 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 4270f93488ef61ac9dca271389675096d8e85af2..0acd2c9af3fcbdcc32ddf588f66e647eed80a74f 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 021f6422fa13dbb3bf54d5b9bf643719fb5fe1f9..0ed4695da499771fdb9421da0343b588cfefdf6c 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