diff --git a/include/ply.h b/include/ply.h
index 03cdf86..9ea9d29 100644
--- a/include/ply.h
+++ b/include/ply.h
@@ -1,6 +1,8 @@
 #ifndef PLY_H
 #define PLY_H
 
+#include <stddef.h>
+
 typedef enum {
   PLY_FORMAT_INVALID = -1,
   PLY_FORMAT_ASCII,
@@ -46,6 +48,42 @@ typedef struct PlyElementStruct {
   struct PlyElementStruct* next;
 } PlyElement;
 
+
+char* ply_formats[] = {
+  "ascii",
+  "binary_little_endian",
+  "binary_big_endian"
+};
+
+char* ply_header_items[] = {
+  "comment",
+  "end_header",
+  "element",
+  "property",
+};
+
+char* ply_type_strings[] = {
+  "char",
+  "uchar",
+  "short",
+  "ushort",
+  "int",
+  "uint",
+  "float",
+  "double",
+};
+
+size_t ply_type_sizes[] = {
+  1,
+  1,
+  2,
+  2,
+  4,
+  4,
+  4,
+  8,
+};
+
 PlyElement* ply_load_mesh(char* filename);
 void ply_free_mesh(PlyElement* elements_head);
 
diff --git a/src/ply.c b/src/ply.c
index 1a859ba..e83dda4 100644
--- a/src/ply.c
+++ b/src/ply.c
@@ -3,41 +3,6 @@
 #include <string.h>
 #include <stdio.h>
 
-char* ply_formats[] = {
-  "ascii",
-  "binary_little_endian",
-  "binary_big_endian"
-};
-
-char* ply_header_items[] = {
-  "comment",
-  "end_header",
-  "element",
-  "property",
-};
-
-char* ply_type_strings[] = {
-  "char",
-  "uchar",
-  "short",
-  "ushort",
-  "int",
-  "uint",
-  "float",
-  "double",
-};
-
-size_t ply_type_sizes[] = {
-  1,
-  1,
-  2,
-  2,
-  4,
-  4,
-  4,
-  8,
-};
-
 PlyPropertyType ply_parse_type(const char* type_string) {
   for(uint32_t i = 0; i < sizeof(ply_type_strings)/sizeof(char*); i++) {
     if(strcmp(ply_type_strings[i], type_string) == 0) {