diff --git a/lib/core/settings.py b/lib/core/settings.py
index 994953229..df5a55d92 100644
--- a/lib/core/settings.py
+++ b/lib/core/settings.py
@@ -18,7 +18,7 @@ from lib.core.enums import OS
 from thirdparty.six import unichr as _unichr
 
 # sqlmap version (<major>.<minor>.<month>.<monthly commit>)
-VERSION = "1.4.8.17"
+VERSION = "1.4.8.18"
 TYPE = "dev" if VERSION.count('.') > 2 and VERSION.split('.')[-1] != '0' else "stable"
 TYPE_COLORS = {"dev": 33, "stable": 90, "pip": 34}
 VERSION_STRING = "sqlmap/%s#%s" % ('.'.join(VERSION.split('.')[:-1]) if VERSION.count('.') > 2 and VERSION.split('.')[-1] == '0' else VERSION, TYPE)
diff --git a/lib/parse/cmdline.py b/lib/parse/cmdline.py
index 65cfc5371..68c0887dc 100644
--- a/lib/parse/cmdline.py
+++ b/lib/parse/cmdline.py
@@ -863,7 +863,7 @@ def cmdLineParser(argv=None):
         _ = []
         advancedHelp = True
         extraHeaders = []
-        tamperIndex = None
+        auxIndexes = {}
 
         # Reference: https://stackoverflow.com/a/4012683 (Note: previously used "...sys.getfilesystemencoding() or UNICODE_ENCODING")
         for arg in argv:
@@ -952,11 +952,15 @@ def cmdLineParser(argv=None):
                 argv[i] = ""
             elif argv[i] in DEPRECATED_OPTIONS:
                 argv[i] = ""
-            elif argv[i].startswith("--tamper"):
-                if tamperIndex is None:
-                    tamperIndex = i if '=' in argv[i] else (i + 1 if i + 1 < len(argv) and not argv[i + 1].startswith('-') else None)
+            elif any(argv[i].startswith(_) for _ in ("--tamper",)):
+                key = re.search(r"\-\-(\w+)", argv[i]).group(1)
+                index = auxIndexes.get(key, None)
+                if index is None:
+                    index = i if '=' in argv[i] else (i + 1 if i + 1 < len(argv) and not argv[i + 1].startswith('-') else None)
+                    auxIndexes[key] = index
                 else:
-                    argv[tamperIndex] = "%s,%s" % (argv[tamperIndex], argv[i].split('=')[1] if '=' in argv[i] else (argv[i + 1] if i + 1 < len(argv) and not argv[i + 1].startswith('-') else ""))
+                    delimiter = ','
+                    argv[index] = "%s%s%s" % (argv[index], delimiter, argv[i].split('=')[1] if '=' in argv[i] else (argv[i + 1] if i + 1 < len(argv) and not argv[i + 1].startswith('-') else ""))
                     argv[i] = ""
             elif argv[i] in ("-H", "--header") or any(argv[i].startswith("%s=" % _) for _ in ("-H", "--header")):
                 if '=' in argv[i]: