diff --git a/include/platform.h b/include/platform.h
new file mode 100644
index 0000000..4e1969b
--- /dev/null
+++ b/include/platform.h
@@ -0,0 +1,12 @@
+#ifndef STK_PLATFORM_H
+#define STK_PLATFORM_H
+
+#ifdef _WIN32
+#define STK_PATH_SEP '\\'
+#define STK_PATH_SEP_STR "\\"
+#else
+#define STK_PATH_SEP '/'
+#define STK_PATH_SEP_STR "/"
+#endif
+
+#endif /* STK_PLATFORM_H */
diff --git a/src/module.c b/src/module.c
index 7c6bab3..1d6f964 100644
--- a/src/module.c
+++ b/src/module.c
@@ -1,3 +1,4 @@
+#include "platform.h"
 #include "stk.h"
 #include <stdint.h>
 #include <stdlib.h>
@@ -5,12 +6,6 @@
 
 #define STK_MOD_FUNC_NAME_BUFFER 64
 
-#ifdef _WIN32
-#define STK_PATH_SEP '\\'
-#else
-#define STK_PATH_SEP '/'
-#endif
-
 typedef int (*stk_init_mod_func)(void);
 typedef void (*stk_shutdown_mod_func)(void);
 
diff --git a/src/stk.c b/src/stk.c
index 15a8f58..50bb3f1 100644
--- a/src/stk.c
+++ b/src/stk.c
@@ -1,4 +1,5 @@
 #include "stk.h"
+#include "platform.h"
 #include "stk_log.h"
 #include <stdint.h>
 #include <stdio.h>
@@ -49,7 +50,7 @@ static void build_path(char *dest, size_t dest_size, const char *dir,
 {
 	dest[0] = '\0';
 	strncat(dest, dir, dest_size - 1);
-	strncat(dest, "/", dest_size - strlen(dest) - 1);
+	strncat(dest, STK_PATH_SEP_STR, dest_size - strlen(dest) - 1);
 	strncat(dest, file, dest_size - strlen(dest) - 1);
 }