diff --git a/kernel/include/limits.h b/kernel/include/limits.h
index a1420e8..9156e0e 100644
--- a/kernel/include/limits.h
+++ b/kernel/include/limits.h
@@ -2,4 +2,29 @@
 #define _LIMIT_H
 #define CHAR_BIT 8
 
+#define INT8_WIDTH 8
+#define INT16_WIDTH 16
+#define INT32_WIDTH 32
+#define INT64_WIDTH 64
+
+#define UINT8_WIDTH 8
+#define UINT16_WIDTH 16
+#define UINT32_WIDTH 32
+#define UINT64_WIDTH 64
+
+#define INT8_MAX 2 * *(INT8_WIDTH - 1) - 1
+#define INT16_MAX 2 * *(INT16_WIDTH - 1) - 1
+#define INT32_MAX 2 * *(INT32_WIDTH - 1) - 1
+#define INT64_MAX 2 * *(INT64_WIDTH - 1) - 1
+
+#define INT8_MIN -2 * *(INT8_WIDTH - 1)
+#define INT16_MIN -2 * *(INT16_WIDTH - 1)
+#define INT32_MIN -2 * *(INT32_WIDTH - 1)
+#define INT64_MIN -2 * *(INT64_WIDTH - 1)
+
+#define UINT8_MAX 2 * *INT8_WIDTH - 1
+#define UINT16_MAX 2 * *INT16_WIDTH - 1
+#define UINT32_MAX 2 * *INT32_WIDTH - 1
+#define UINT64_MAX 2 * *INT64_WIDTH - 1
+
 #endif