diff --git a/lib/core/common.py b/lib/core/common.py
index 77db14ed5..c8ca6597d 100644
--- a/lib/core/common.py
+++ b/lib/core/common.py
@@ -136,7 +136,7 @@ def formatDBMSfp(versions=None):
     @rtype: C{str}
     """
 
-    if ( not versions or versions == [None] ) and kb.dbmsVersion[0] != "Unknown":
+    if ( not versions or versions == [None] ) and kb.dbmsVersion and kb.dbmsVersion[0] != "Unknown":
         versions = kb.dbmsVersion
 
     if isinstance(versions, str):
diff --git a/lib/core/target.py b/lib/core/target.py
index 6fffd684c..4f7f6ae25 100644
--- a/lib/core/target.py
+++ b/lib/core/target.py
@@ -231,7 +231,7 @@ def initTargetEnv():
 
         kb.dbms           = None
         kb.dbmsDetected   = False
-        kb.dbmsVersion    = None
+        kb.dbmsVersion    = [ "Unknown" ]
         kb.injParameter   = None
         kb.injPlace       = None
         kb.injType        = None