diff --git a/Core/gb.c b/Core/gb.c
index 24d7329..0f027ef 100644
--- a/Core/gb.c
+++ b/Core/gb.c
@@ -1319,6 +1319,11 @@ bool GB_is_cgb(GB_gameboy_t *gb)
     return (gb->model & GB_MODEL_FAMILY_MASK) == GB_MODEL_CGB_FAMILY;
 }
 
+bool GB_is_cgb_in_cgb_mode(GB_gameboy_t *gb)
+{
+    return gb->cgb_mode;
+}
+
 bool GB_is_sgb(GB_gameboy_t *gb)
 {
     return (gb->model & ~GB_MODEL_PAL_BIT & ~GB_MODEL_NO_SFC_BIT) == GB_MODEL_SGB || (gb->model & ~GB_MODEL_NO_SFC_BIT) == GB_MODEL_SGB2;
diff --git a/Core/gb.h b/Core/gb.h
index cc235e8..d7eda27 100644
--- a/Core/gb.h
+++ b/Core/gb.h
@@ -765,6 +765,7 @@ __attribute__((__format__ (__printf__, fmtarg, firstvararg)))
 void GB_init(GB_gameboy_t *gb, GB_model_t model);
 bool GB_is_inited(GB_gameboy_t *gb);
 bool GB_is_cgb(GB_gameboy_t *gb);
+bool GB_is_cgb_in_cgb_mode(GB_gameboy_t *gb);
 bool GB_is_sgb(GB_gameboy_t *gb); // Returns true if the model is SGB or SGB2
 bool GB_is_hle_sgb(GB_gameboy_t *gb); // Returns true if the model is SGB or SGB2 and the SFC/SNES side is HLE'd
 GB_model_t GB_get_model(GB_gameboy_t *gb);