2 files changed, 3 insertions, 1 deletions
diff --git a/keyboards/crkbd/ssd1306.c b/keyboards/crkbd/ssd1306.c
index b2676f386f..4ec8a9a00f 100644
--- a/keyboards/crkbd/ssd1306.c
+++ b/keyboards/crkbd/ssd1306.c
@@ -10,6 +10,8 @@
 #include "sendchar.h"
 #include "timer.h"
 
+struct CharacterMatrix display;
+
 extern const unsigned char font[] PROGMEM;
 
 #ifndef OLED_BLANK_CHAR
diff --git a/keyboards/crkbd/ssd1306.h b/keyboards/crkbd/ssd1306.h
index 0ca093093a..11a3cc67f4 100644
--- a/keyboards/crkbd/ssd1306.h
+++ b/keyboards/crkbd/ssd1306.h
@@ -65,7 +65,7 @@ struct CharacterMatrix {
   bool dirty;
 };
 
-struct CharacterMatrix display;
+extern struct CharacterMatrix display;
 
 bool iota_gfx_init(bool rotate);
 void iota_gfx_task(void);