diff --git a/plat/nvidia/tegra/include/platform_def.h b/plat/nvidia/tegra/include/platform_def.h
index 70ddaa9..cd06d93 100644
--- a/plat/nvidia/tegra/include/platform_def.h
+++ b/plat/nvidia/tegra/include/platform_def.h
@@ -40,7 +40,7 @@
  ******************************************************************************/
 
 /* Size of cacheable stacks */
-#if IMAGE_BL31
+#ifdef IMAGE_BL31
 #define PLATFORM_STACK_SIZE 0x400
 #endif