diff --git a/configs/stm3240g-eval/src/Makefile b/configs/stm3240g-eval/src/Makefile
index 7174fb1bc98..40c3b8769be 100644
--- a/configs/stm3240g-eval/src/Makefile
+++ b/configs/stm3240g-eval/src/Makefile
@@ -92,6 +92,10 @@ ifeq ($(CONFIG_INPUT_STMPE811),y)
 CSRCS		+= up_stmpe811.c
 endif
 
+ifeq ($(CONFIG_QENCODER),y)
+CSRCS		+= up_qencoder.c
+endif
+
 COBJS		= $(CSRCS:.c=$(OBJEXT))
 
 SRCS		= $(ASRCS) $(CSRCS)