diff --git a/libs/utils/BlobCache.cpp b/libs/utils/BlobCache.cpp
index e52cf2f..be398ee 100644
--- a/libs/utils/BlobCache.cpp
+++ b/libs/utils/BlobCache.cpp
@@ -183,7 +183,7 @@
 status_t BlobCache::flatten(void* buffer, size_t size, int fds[], size_t count)
         const {
     if (count != 0) {
-        ALOGE("flatten: nonzero fd count: %d", count);
+        ALOGE("flatten: nonzero fd count: %zu", count);
         return BAD_VALUE;
     }
 
@@ -234,7 +234,7 @@
     mCacheEntries.clear();
 
     if (count != 0) {
-        ALOGE("unflatten: nonzero fd count: %d", count);
+        ALOGE("unflatten: nonzero fd count: %zu", count);
         return BAD_VALUE;
     }
 
diff --git a/libs/utils/Debug.cpp b/libs/utils/Debug.cpp
index f7988ec..e8ac983 100644
--- a/libs/utils/Debug.cpp
+++ b/libs/utils/Debug.cpp
@@ -199,7 +199,7 @@
     if ((int32_t)length < 0) {
         if (singleLineBytesCutoff < 0) func(cookie, "\n");
         char buf[64];
-        sprintf(buf, "(bad length: %d)", length);
+        sprintf(buf, "(bad length: %zu)", length);
         func(cookie, buf);
         return;
     }
diff --git a/libs/utils/Static.cpp b/libs/utils/Static.cpp
index bfcb2da..624e917 100644
--- a/libs/utils/Static.cpp
+++ b/libs/utils/Static.cpp
@@ -57,8 +57,8 @@
     virtual status_t writeLines(const struct iovec& vec, size_t N)
     {
         //android_writevLog(&vec, N);       <-- this is now a no-op
-        if (N != 1) ALOGI("WARNING: writeLines N=%d\n", N);
-        ALOGI("%.*s", vec.iov_len, (const char*) vec.iov_base);
+        if (N != 1) ALOGI("WARNING: writeLines N=%zu\n", N);
+        ALOGI("%.*s", (int)vec.iov_len, (const char*) vec.iov_base);
         return NO_ERROR;
     }
 };
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));
     }
 }