diff --git a/libretro-db/libretrodb.c b/libretro-db/libretrodb.c
index e636444aa9..23e8ec92e3 100644
--- a/libretro-db/libretrodb.c
+++ b/libretro-db/libretrodb.c
@@ -21,6 +21,8 @@
 #include "query.h"
 #include "libretrodb.h"
 
+#define MAGIC_NUMBER "RARCHDB"
+
 struct node_iter_ctx
 {
 	libretrodb_t *db;
diff --git a/libretro-db/libretrodb.h b/libretro-db/libretrodb.h
index 8d01e32569..1af26d1f2f 100644
--- a/libretro-db/libretrodb.h
+++ b/libretro-db/libretrodb.h
@@ -9,8 +9,6 @@
 #endif
 #include "rmsgpack_dom.h"
 
-#define MAGIC_NUMBER "RARCHDB"
-
 #ifdef __cplusplus
 extern "C" {
 #endif