diff --git a/top/x300/Makefile b/top/x300/Makefile
index 6e1e3f8..7064dd3 100644
--- a/top/x300/Makefile
+++ b/top/x300/Makefile
@@ -187,7 +187,7 @@ X310_IP:
 
 clean:    ##Clean up all target build outputs.
 	@echo "Cleaning targets..."
-	@rm -rf $(BUILD_BASE_DIR)/build-X3*_* $(BUILD_BASE_DIR)/build-x3* $(BUILD_DIR)
+	@rm -rf $(BUILD_BASE_DIR)/build-X3*_* $(BUILD_BASE_DIR)/build-x3* $(BUILD_BASE_DIR)/build-usrp* $(BUILD_DIR)
 	@rm -rf $(BUILD_OUTPUT_DIR)
 
 cleanall: ##Clean up all target and ip build outputs.
diff --git a/top/x400/Makefile b/top/x400/Makefile
index cca0da3..10c2412 100644
--- a/top/x400/Makefile
+++ b/top/x400/Makefile
@@ -155,7 +155,7 @@ endif
 
 clean:        ##Clean up all target build outputs.
 	@echo "Cleaning targets..."
-	@rm -rf $(BUILD_BASE_DIR)/build-X* $(BUILD_BASE_DIR)/build-x* $(BUILD_DIR)
+	@rm -rf $(BUILD_BASE_DIR)/build-X* $(BUILD_BASE_DIR)/build-x* $(BUILD_BASE_DIR)/build-usrp* $(BUILD_DIR)
 	@rm -rf $(BUILD_OUTPUT_DIR)
 
 cleanall:     ##Clean up all target and IP build outputs.