diff --git a/src/ldaptools/slapd.py b/src/ldaptools/slapd.py
index 41ba770..a3d343e 100644
--- a/src/ldaptools/slapd.py
+++ b/src/ldaptools/slapd.py
@@ -185,7 +185,10 @@ olcAccess: {{0}}to * by * manage
 
         if context:
             ldif = ldif.format(**context)
-        slapadd = self.create_process([SLAPADD_PATH, '-v', '-n%d' % db, '-F', self.config_dir])
+        slapadd = subprocess.Popen(
+            [SLAPADD_PATH, '-v', '-n%d' % db, '-F', self.config_dir],
+            stdin=subprocess.PIPE, env=os.environ,
+            stdout=subprocess.PIPE, stderr=subprocess.PIPE)
         stdout, stderr = slapadd.communicate(input=bytearray(ldif, 'utf-8'))
         assert slapadd.returncode == 0, 'slapadd failed: %s' % stderr