diff --git a/src/constants.h b/src/constants.h
index bd40c278..c8df3826 100644
--- a/src/constants.h
+++ b/src/constants.h
@@ -1,6 +1,7 @@
 #ifndef SRC_CONSTANTS_H_
 #define SRC_CONSTANTS_H_
 
+#include <limits.h>
 #include "typedefs.h"
 
 #define CHUNK_W 16
@@ -17,4 +18,4 @@ inline uint vox_index(int x, int y, int z, int w, int d) {
 	return (y * d + z) * w + x;
 }
 
-#endif // SRC_CONSTANTS_H_
\ No newline at end of file
+#endif // SRC_CONSTANTS_H_
diff --git a/src/files/rle.h b/src/files/rle.h
index b12a1adc..0dcbe042 100644
--- a/src/files/rle.h
+++ b/src/files/rle.h
@@ -14,4 +14,4 @@ namespace extrle {
 	size_t decode(const ubyte* src, size_t length, ubyte* dst);
 }
 
-#endif // FILES_RLE_H_
\ No newline at end of file
+#endif // FILES_RLE_H_
diff --git a/src/typedefs.h b/src/typedefs.h
index 513bf940..8bc06297 100644
--- a/src/typedefs.h
+++ b/src/typedefs.h
@@ -1,3 +1,4 @@
+#include <stdlib.h>
 #include <stdint.h>
 
 typedef unsigned int uint;