diff --git a/libs/utils/StopWatch.cpp b/libs/utils/StopWatch.cpp
index 595aec3..b1708d6 100644
--- a/libs/utils/StopWatch.cpp
+++ b/libs/utils/StopWatch.cpp
@@ -20,6 +20,10 @@
 #include <stdlib.h>
 #include <stdio.h>
 
+/* for PRId64 */
+#define __STDC_FORMAT_MACROS 1
+#include <inttypes.h>
+
 #include <utils/Log.h>
 #include <utils/Errors.h>
 #include <utils/StopWatch.h>
@@ -39,11 +43,11 @@
 {
     nsecs_t elapsed = elapsedTime();
     const int n = mNumLaps;
-    ALOGD("StopWatch %s (us): %lld ", mName, ns2us(elapsed));
+    ALOGD("StopWatch %s (us): %" PRId64 " ", mName, ns2us(elapsed));
     for (int i=0 ; i<n ; i++) {
         const nsecs_t soFar = mLaps[i].soFar;
         const nsecs_t thisLap = mLaps[i].thisLap;
-        ALOGD(" [%d: %lld, %lld]", i, ns2us(soFar), ns2us(thisLap));
+        ALOGD(" [%d: %" PRId64 ", %" PRId64, i, ns2us(soFar), ns2us(thisLap));
     }
 }