diff --git a/camera/CameraParameters2.cpp b/camera/CameraParameters2.cpp
index 378afeb..c29233c 100644
--- a/camera/CameraParameters2.cpp
+++ b/camera/CameraParameters2.cpp
@@ -351,7 +351,7 @@
 
 void CameraParameters2::dump() const
 {
-    ALOGD("dump: mMap.size = %d", mMap.size());
+    ALOGD("dump: mMap.size = %zu", mMap.size());
     for (size_t i = 0; i < mMap.size(); i++) {
         String8 k, v;
         k = mMap.keyAt(i);