diff --git a/releng/releng_cxx b/releng/releng_cxx
index 4ce60910..03c31332 100755
--- a/releng/releng_cxx
+++ b/releng/releng_cxx
@@ -92,8 +92,8 @@ fi
       exit 7
    fi
    BASE=$(basename ${SMPL}.obj)
-   printf "${SELF}: Running LD_LIBRARY_PATH=../libisoburn/.libs/  ${GEN_DATA_DIR}/${BASE}"
-   LD_LIBRARY_PATH=../libisoburn/.libs/ ${GEN_DATA_DIR}/${BASE}
+   printf "${SELF}: Running LD_LIBRARY_PATH=../libisoburn/.libs/:${LD_LIBRARY_PATH} ${GEN_DATA_DIR}/${BASE}"
+   LD_LIBRARY_PATH=../libisoburn/.libs/:${LD_LIBRARY_PATH} ${GEN_DATA_DIR}/${BASE}
    RET_SMPL="$?"
    case ${RET_SMPL} in
     0)