diff --git a/ncc/include/stdint.h b/ncc/include/stdint.h
index 47510a7..9ddba5a 100644
--- a/ncc/include/stdint.h
+++ b/ncc/include/stdint.h
@@ -8,14 +8,19 @@
 #define uint64_t u64
 
 // Unsigned integer ranges
+#define UINT8_MAX  0xFF
 #define UINT16_MAX 0xFFFF
 #define UINT32_MAX 0xFFFFFFFF
 #define UINT64_MAX 0xFFFFFFFFFFFFFFFF
 
 // Signed integer ranges
+#define INT8_MIN  0x80
+#define INT8_MAX  0x7F
 #define INT16_MIN 0x8000
 #define INT16_MAX 0x7FFF
 #define INT32_MIN 0x80000000
 #define INT32_MAX 0x7FFFFFFF
+#define INT64_MIN 0x8000000000000000
+#define INT64_MAX 0x7FFFFFFFFFFFFFFF
 
 #endif
diff --git a/ncc/include/stdio.h b/ncc/include/stdio.h
index 2982933..544a94f 100644
--- a/ncc/include/stdio.h
+++ b/ncc/include/stdio.h
@@ -3,6 +3,8 @@
 
 #include <assert.h>
 
+#define EOF -1
+
 int puts(char* str)
 {
     asm (str) -> void { syscall print_str; };