diff --git a/subr/build_init.subr b/subr/build_init.subr
index 3ae592e..8049af6 100644
--- a/subr/build_init.subr
+++ b/subr/build_init.subr
@@ -49,7 +49,7 @@ build_init() {
 		touch "${DEFAULT_BUILD_STATUS_IN_PROGRESS_FNAME}";
 	fi;
 	if [ -e "${DEFAULT_BUILD_LOG_FNAME}" ]; then
-		ex_rtl_fileop mv "${DEFAULT_BUILD_LOG_FNAME} ${DEFAULT_BUILD_LOG_LAST_FNAME}";
+		ex_rtl_fileop mv "${DEFAULT_BUILD_LOG_FNAME}" "${DEFAULT_BUILD_LOG_LAST_FNAME}";
 	fi;
 	ex_rtl_fileop touch "${DEFAULT_BUILD_LOG_FNAME}";
 	BUILD_IS_PARENT=1;