diff --git a/lib/controller/checks.py b/lib/controller/checks.py
index e8fda54ec..62b0004d7 100644
--- a/lib/controller/checks.py
+++ b/lib/controller/checks.py
@@ -128,7 +128,7 @@ def checkSqlInjection(place, parameter, value):
                 # then attempt to identify with a simple DBMS specific boolean-based
                 # test what the DBMS may be
                 if not injection.dbms and PAYLOAD.TECHNIQUE.BOOLEAN in injection.data:
-                    if not Backend.getIdentifiedDbms() and kb.heuristicDbms is None:
+                    if not Backend.getIdentifiedDbms() and kb.heuristicDbms is None and not kb.droppingRequests:
                         kb.heuristicDbms = heuristicCheckDbms(injection)
 
                 # If the DBMS has already been fingerprinted (via DBMS-specific
diff --git a/lib/core/option.py b/lib/core/option.py
index d7b66b28f..9061e1b18 100755
--- a/lib/core/option.py
+++ b/lib/core/option.py
@@ -1902,6 +1902,7 @@ def _setKnowledgeBaseAttributes(flushAll=True):
     kb.dnsMode = False
     kb.dnsTest = None
     kb.docRoot = None
+    kb.droppingRequests = False
     kb.dumpColumns = None
     kb.dumpTable = None
     kb.dumpKeyboardInterrupt = False
diff --git a/lib/core/settings.py b/lib/core/settings.py
index fbf6e075b..83fcc7eb8 100755
--- a/lib/core/settings.py
+++ b/lib/core/settings.py
@@ -19,7 +19,7 @@ from lib.core.enums import DBMS_DIRECTORY_NAME
 from lib.core.enums import OS
 
 # sqlmap version (<major>.<minor>.<month>.<monthly commit>)
-VERSION = "1.1.5.11"
+VERSION = "1.1.5.12"
 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/request/connect.py b/lib/request/connect.py
index befe8b972..3f466db95 100644
--- a/lib/request/connect.py
+++ b/lib/request/connect.py
@@ -642,6 +642,7 @@ class Connect(object):
 
                 if kb.testMode and kb.testType not in (None, PAYLOAD.TECHNIQUE.TIME, PAYLOAD.TECHNIQUE.STACKED):
                     singleTimeWarnMessage("there is a possibility that the target (or WAF/IPS/IDS) is dropping 'suspicious' requests")
+                    kb.droppingRequests = True
                 warnMsg = "connection timed out to the target URL"
             elif "Connection reset" in tbMsg:
                 if not conf.disablePrecon:
@@ -650,6 +651,7 @@ class Connect(object):
 
                 if kb.testMode:
                     singleTimeWarnMessage("there is a possibility that the target (or WAF/IPS/IDS) is resetting 'suspicious' requests")
+                    kb.droppingRequests = True
                 warnMsg = "connection reset to the target URL"
             elif "URLError" in tbMsg or "error" in tbMsg:
                 warnMsg = "unable to connect to the target URL"
diff --git a/txt/checksum.md5 b/txt/checksum.md5
index f0b8e5e5c..8cee30e6c 100644
--- a/txt/checksum.md5
+++ b/txt/checksum.md5
@@ -21,7 +21,7 @@ c55b400b72acc43e0e59c87dd8bb8d75  extra/shellcodeexec/windows/shellcodeexec.x32.
 310efc965c862cfbd7b0da5150a5ad36  extra/sqlharvest/__init__.py
 7713aa366c983cdf1f3dbaa7383ea9e1  extra/sqlharvest/sqlharvest.py
 7afe836fd97271ccba67b4c0da2482ff  lib/controller/action.py
-3446d524306f5f9648624a60e209ee6d  lib/controller/checks.py
+fec857280fd553ee7e9b49fdfe104402  lib/controller/checks.py
 130d1c16708668b8d89605b6b5b38bf5  lib/controller/controller.py
 52a3969f57170e935e3fc0156335bf2c  lib/controller/handler.py
 310efc965c862cfbd7b0da5150a5ad36  lib/controller/__init__.py
@@ -40,13 +40,13 @@ b9ff4e622c416116bee6024c0f050349  lib/core/enums.py
 310efc965c862cfbd7b0da5150a5ad36  lib/core/__init__.py
 9ba39bf66e9ecd469446bdbbeda906c3  lib/core/log.py
 edcfce0850771e6454acef244d5c5760  lib/core/optiondict.py
-636485a22f158bec137d63c73aeace5c  lib/core/option.py
+80060cb3b090d6de0503c02848d60171  lib/core/option.py
 5f2f56e6c5f274408df61943f1e080c0  lib/core/profiling.py
 40be71cd774662a7b420caeb7051e7d5  lib/core/readlineng.py
 d8e9250f3775119df07e9070eddccd16  lib/core/replication.py
 785f86e3f963fa3798f84286a4e83ff2  lib/core/revision.py
 40c80b28b3a5819b737a5a17d4565ae9  lib/core/session.py
-00b923cc4daaefe16525a88fa949d189  lib/core/settings.py
+c1a41006c25d16699e988ec2adb0895d  lib/core/settings.py
 d91291997d2bd2f6028aaf371bf1d3b6  lib/core/shell.py
 2ad85c130cc5f2b3701ea85c2f6bbf20  lib/core/subprocessng.py
 8136241fdbdb99a5dc0e51ba72918f6e  lib/core/target.py
@@ -68,7 +68,7 @@ ad74fc58fc7214802fd27067bce18dd2  lib/core/unescaper.py
 403d873f1d2fd0c7f73d83f104e41850  lib/request/basicauthhandler.py
 a79f7c4259418fbc66229a1cb2e945bd  lib/request/basic.py
 ef48de622b0a6b4a71df64b0d2785ef8  lib/request/comparison.py
-f58d13b6d6ff0078742d6fce09219849  lib/request/connect.py
+aa43e66ab7e6afb6d276327287a5f168  lib/request/connect.py
 fb6b788d0016ab4ec5e5f661f0f702ad  lib/request/direct.py
 cc1163d38e9b7ee5db2adac6784c02bb  lib/request/dns.py
 5dcdb37823a0b5eff65cd1018bcf09e4  lib/request/httpshandler.py