diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c b/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c
index fa2b47d41ee2..30264fc151a2 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c
@@ -65,6 +65,10 @@
 //Register access policy version
 #define mmMP0_SMN_C2PMSG_91				0x1609B
 
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+static const uint32_t abm_gain_stepsize = 0x0060;
+#endif
+
 static bool dce_dmcu_init(struct dmcu *dmcu)
 {
 	// Do nothing
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.h b/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.h
index 93e7f34d4775..cefb7f5bf42c 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.h
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.h
@@ -317,6 +317,4 @@ struct dmcu *dcn21_dmcu_create(
 
 void dce_dmcu_destroy(struct dmcu **dmcu);
 
-static const uint32_t abm_gain_stepsize = 0x0060;
-
 #endif /* _DCE_ABM_H_ */