diff --git a/common_features.mk b/common_features.mk
index 65ff6b5b38..5dc346f76f 100644
--- a/common_features.mk
+++ b/common_features.mk
@@ -239,7 +239,7 @@ QUANTUM_SRC:= \
     $(QUANTUM_DIR)/keymap_common.c \
     $(QUANTUM_DIR)/keycode_config.c
 
-ifndef CUSTOM_MATRIX
+ifneq ($(strip $(CUSTOM_MATRIX)), yes)
     ifeq ($(strip $(SPLIT_KEYBOARD)), yes)
         QUANTUM_SRC += $(QUANTUM_DIR)/split_common/matrix.c
     else