diff --git a/zephyr/Makefile b/zephyr/Makefile
index 2cc314b533acdc0de1d28716ddb7eb54a1eaf341..d07a0de5bbf80639937321f39630eb579aa56fbc 100644
--- a/zephyr/Makefile
+++ b/zephyr/Makefile
@@ -42,6 +42,9 @@ SRC_C = main.c \
 	$(BUILD)/frozen.c \
 	$(SRC_MOD)
 
+# List of sources for qstr extraction
+SRC_QSTR += $(SRC_C)
+
 OBJ = $(PY_O) $(addprefix $(BUILD)/, $(SRC_C:.c=.o))
 
 CFLAGS = $(KBUILD_CFLAGS) $(NOSTDINC_FLAGS) $(ZEPHYRINCLUDE) \