diff --git a/selftest/gdb_backtrace b/selftest/gdb_backtrace
index ef02e784efc..4fe5f57353a 100755
--- a/selftest/gdb_backtrace
+++ b/selftest/gdb_backtrace
@@ -2,6 +2,8 @@
 
 BASENAME=`basename $0`
 
+unset LD_PRELOAD
+
 if [ -n "$VALGRIND" -o -n "$SMBD_VALGRIND" ]; then
 	echo "${BASENAME}: Not running debugger under valgrind"
 	exit 1