diff --git a/openair-cn/SCRIPTS/install_asn1c_0.9.24.modified.bash b/openair-cn/SCRIPTS/install_asn1c_0.9.24.modified.bash
index e8a33ac5d94d931b22d33072bf2c3f5c8f4a1e0d..adaa0d56547244698b70ac29095a8ac72b4efdee 100755
--- a/openair-cn/SCRIPTS/install_asn1c_0.9.24.modified.bash
+++ b/openair-cn/SCRIPTS/install_asn1c_0.9.24.modified.bash
@@ -30,7 +30,7 @@
 # Tested on ubuntu 12.04 with updates 07 november 2013
 
 
-rm -Rf /usr/local/src/asn1c-r1516
+sudo rm -Rf /usr/local/src/asn1c-r1516
 sudo svn co https://github.com/vlm/asn1c/trunk  /usr/local/src/asn1c-r1516 -r 1516
 cd /usr/local/src/asn1c-r1516
 sudo patch -p0 < $OPENAIRCN_DIR/S1AP/MESSAGES/ASN1/asn1cpatch.p0