diff --git a/trusty/apploader/apploader.cpp b/trusty/apploader/apploader.cpp
index 8ab6303..4aca375 100644
--- a/trusty/apploader/apploader.cpp
+++ b/trusty/apploader/apploader.cpp
@@ -96,13 +96,13 @@
 
     unique_fd file_fd(TEMP_FAILURE_RETRY(open(file_name, O_RDONLY)));
     if (!file_fd.ok()) {
-        fprintf(stderr, "Error opening file '%s': %s\n", file_name, strerror(errno));
+        PLOG(ERROR) << "Error opening file " << file_name;
         return {};
     }
 
     rc = fstat64(file_fd, &st);
     if (rc < 0) {
-        fprintf(stderr, "Error calling stat on file '%s': %s\n", file_name, strerror(errno));
+        PLOG(ERROR) << "Error calling stat on file '" << file_name << "'";
         return {};
     }
 
@@ -115,14 +115,14 @@
         file_page_offset = page_size - file_page_offset;
     }
     if (__builtin_add_overflow(file_size, file_page_offset, &file_page_size)) {
-        fprintf(stderr, "Failed to page-align file size\n");
+        LOG(ERROR) << "Failed to page-align file size";
         return {};
     }
 
     BufferAllocator alloc;
     unique_fd dmabuf_fd(alloc.Alloc(kDmabufSystemHeapName, file_page_size));
     if (!dmabuf_fd.ok()) {
-        fprintf(stderr, "Error creating dmabuf: %d\n", dmabuf_fd.get());
+        LOG(ERROR) << "Error creating dmabuf: " << dmabuf_fd.get();
         return dmabuf_fd;
     }
 
@@ -137,12 +137,12 @@
                 pread(file_fd, (char*)shm + file_offset, file_size - file_offset, file_offset));
 
         if (num_read < 0) {
-            fprintf(stderr, "Error reading package file '%s': %s\n", file_name, strerror(errno));
+            PLOG(ERROR) << "Error reading package file '" << file_name << "'";
             break;
         }
 
         if (num_read == 0) {
-            fprintf(stderr, "Unexpected end of file '%s'\n", file_name);
+            LOG(ERROR) << "Unexpected end of file '" << file_name << "'";
             break;
         }
 
@@ -182,17 +182,17 @@
     struct apploader_resp resp;
     ssize_t rc = read(tipc_fd, &resp, sizeof(resp));
     if (rc < 0) {
-        fprintf(stderr, "Failed to read response: %zd\n", rc);
+        PLOG(ERROR) << "Failed to read response";
         return rc;
     }
 
     if (rc < sizeof(resp)) {
-        fprintf(stderr, "Not enough data in response: %zd\n", rc);
+        LOG(ERROR) << "Not enough data in response: " << rc;
         return -EIO;
     }
 
     if (resp.hdr.cmd != (APPLOADER_CMD_LOAD_APPLICATION | APPLOADER_RESP_BIT)) {
-        fprintf(stderr, "Invalid command in response: %u\n", resp.hdr.cmd);
+        LOG(ERROR) << "Invalid command in response: " << resp.hdr.cmd;
         return -EINVAL;
     }
 
@@ -200,28 +200,28 @@
         case APPLOADER_NO_ERROR:
             break;
         case APPLOADER_ERR_UNKNOWN_CMD:
-            fprintf(stderr, "Error: unknown command\n");
+            LOG(ERROR) << "Error: unknown command";
             break;
         case APPLOADER_ERR_INVALID_CMD:
-            fprintf(stderr, "Error: invalid command arguments\n");
+            LOG(ERROR) << "Error: invalid command arguments";
             break;
         case APPLOADER_ERR_NO_MEMORY:
-            fprintf(stderr, "Error: out of Trusty memory\n");
+            LOG(ERROR) << "Error: out of Trusty memory";
             break;
         case APPLOADER_ERR_VERIFICATION_FAILED:
-            fprintf(stderr, "Error: failed to verify the package\n");
+            LOG(ERROR) << "Error: failed to verify the package";
             break;
         case APPLOADER_ERR_LOADING_FAILED:
-            fprintf(stderr, "Error: failed to load the package\n");
+            LOG(ERROR) << "Error: failed to load the package";
             break;
         case APPLOADER_ERR_ALREADY_EXISTS:
-            fprintf(stderr, "Error: application already exists\n");
+            LOG(ERROR) << "Error: application already exists";
             break;
         case APPLOADER_ERR_INTERNAL:
-            fprintf(stderr, "Error: internal apploader error\n");
+            LOG(ERROR) << "Error: internal apploader error";
             break;
         default:
-            fprintf(stderr, "Unrecognized error: %u\n", resp.error);
+            LOG(ERROR) << "Unrecognized error: " << resp.error;
             break;
     }
 
@@ -241,14 +241,14 @@
 
     tipc_fd = tipc_connect(dev_name, APPLOADER_PORT);
     if (tipc_fd < 0) {
-        fprintf(stderr, "Failed to connect to Trusty app loader: %s\n", strerror(-tipc_fd));
+        LOG(ERROR) << "Failed to connect to Trusty app loader: " << strerror(-tipc_fd);
         rc = tipc_fd;
         goto err_tipc_connect;
     }
 
     rc = send_load_message(tipc_fd, package_fd, package_size);
     if (rc < 0) {
-        fprintf(stderr, "Failed to send package: %zd\n", rc);
+        LOG(ERROR) << "Failed to send package: " << rc;
         goto err_send;
     }