diff --git a/cmds/flatland/Composers.cpp b/cmds/flatland/Composers.cpp
index 15cdb29..1173a81 100644
--- a/cmds/flatland/Composers.cpp
+++ b/cmds/flatland/Composers.cpp
@@ -122,12 +122,12 @@
     virtual void tearDown() {
     }
 
-    virtual bool compose(GLuint texName, const sp<GLConsumer>& glc) {
+    virtual bool compose(GLuint /*texName*/, const sp<GLConsumer>& /*glc*/) {
         return true;
     }
 
 protected:
-    virtual bool setUp(GLHelper* helper) {
+    virtual bool setUp(GLHelper* /*helper*/) {
         return true;
     }
 
diff --git a/cmds/flatland/GLHelper.cpp b/cmds/flatland/GLHelper.cpp
index 42694b3..05d082b 100644
--- a/cmds/flatland/GLHelper.cpp
+++ b/cmds/flatland/GLHelper.cpp
@@ -332,7 +332,7 @@
 
 static void printShaderSource(const char* const* src) {
     for (size_t i = 0; i < MAX_SHADER_LINES && src[i] != NULL; i++) {
-        fprintf(stderr, "%3d: %s\n", i+1, src[i]);
+        fprintf(stderr, "%3zu: %s\n", i+1, src[i]);
     }
 }
 
diff --git a/cmds/flatland/Main.cpp b/cmds/flatland/Main.cpp
index d6ac3d2..c0e5b3d 100644
--- a/cmds/flatland/Main.cpp
+++ b/cmds/flatland/Main.cpp
@@ -600,7 +600,7 @@
 
     uint32_t runHeight = b.runHeights[run];
     uint32_t runWidth = b.width * runHeight / b.height;
-    printf(" %-*s | %4d x %4d | ", g_BenchmarkNameLen, b.name,
+    printf(" %-*s | %4d x %4d | ", static_cast<int>(g_BenchmarkNameLen), b.name,
             runWidth, runHeight);
     fflush(stdout);
 
@@ -690,8 +690,9 @@
     size_t len = strlen(scenario);
     size_t leftPad = (g_BenchmarkNameLen - len) / 2;
     size_t rightPad = g_BenchmarkNameLen - len - leftPad;
-    printf(" %*s%s%*s | Resolution  | Time (ms)\n", leftPad, "",
-            "Scenario", rightPad, "");
+    printf(" %*s%s%*s | Resolution  | Time (ms)\n",
+            static_cast<int>(leftPad), "",
+            "Scenario", static_cast<int>(rightPad), "");
 }
 
 // Run ALL the benchmarks!