diff --git a/10.01_base/2_src/arm/utils.hpp b/10.01_base/2_src/arm/utils.hpp
index fc08390..8d480a6 100644
--- a/10.01_base/2_src/arm/utils.hpp
+++ b/10.01_base/2_src/arm/utils.hpp
@@ -37,8 +37,8 @@
 
 #include "logger.hpp"
 
-#define MILLION 1000000L
-#define BILLION (1000L * MILLION)
+#define MILLION 1000000LL
+#define BILLION (1000LL * MILLION)
 
 #define BIT(n) (1 << (n))