diff --git a/make/wtools.mk b/make/wtools.mk
index f4ab41cb7f..979a6f5031 100644
--- a/make/wtools.mk
+++ b/make/wtools.mk
@@ -19,7 +19,7 @@ $(WTOOLS_BUILD_DIR)/.configured: $(WTOOLS_BUILD_DIR)/.unpacked
 	touch  $(WTOOLS_BUILD_DIR)/.configured
 
 $(WTOOLS_BUILD_DIR)/iwconfig: $(WTOOLS_BUILD_DIR)/.configured
-	$(MAKE) -C $(WTOOLS_BUILD_DIR) KERNEL_SRC=$(TOOL_BUILD_DIR)/linux \
+	$(MAKE) -C $(WTOOLS_BUILD_DIR) \
 		CC=$(TARGET_CC) CFLAGS="$(TARGET_CFLAGS)"
 
 $(TARGET_DIR)/sbin/iwconfig: $(WTOOLS_BUILD_DIR)/iwconfig