diff --git a/subhook.h b/subhook.h
index 03d9b5f..61e363f 100644
--- a/subhook.h
+++ b/subhook.h
@@ -124,6 +124,12 @@ SUBHOOK_EXPORT int SUBHOOK_API subhook_remove(subhook_t hook);
  */
 SUBHOOK_EXPORT void *SUBHOOK_API subhook_read_dst(void *src);
 
+/*
+ * Returns the length of the first instruction in src. You can replace it with
+ * a custom function via subhook_set_disasm_handler.
+ */
+SUBHOOK_EXPORT int SUBHOOK_API subhook_disasm(void *src, int *reloc_op_offset);
+
 /*
  * Sets a custom disassmbler function to use in place of the default one
  * (subhook_disasm).
diff --git a/subhook_x86.c b/subhook_x86.c
index 7c36b82..95c1f24 100644
--- a/subhook_x86.c
+++ b/subhook_x86.c
@@ -88,7 +88,7 @@ struct subhook_jmp64 {
 
 extern subhook_disasm_handler_t subhook_disasm_handler;
 
-static int subhook_disasm(void *src, int *reloc_op_offset) {
+SUBHOOK_EXPORT int SUBHOOK_API subhook_disasm(void *src, int *reloc_op_offset) {
   enum flags {
     MODRM      = 1,
     PLUS_R     = 1 << 1,