diff --git a/lib/core/option.py b/lib/core/option.py
index 8d15a6484..b9a1246c3 100644
--- a/lib/core/option.py
+++ b/lib/core/option.py
@@ -1070,6 +1070,7 @@ def __setKnowledgeBaseAttributes():
 
     kb.parenthesis     = None
     kb.partRun         = None
+    kb.proxyAuthHeader = None
     kb.lastRequestUID  = 0
     kb.queryCounter    = 0
     kb.resumedQueries  = {}
diff --git a/lib/core/target.py b/lib/core/target.py
index 59f6dd0c5..b01aa8686 100644
--- a/lib/core/target.py
+++ b/lib/core/target.py
@@ -296,6 +296,7 @@ def initTargetEnv():
         kb.injType        = None
         kb.nullConnection = None
         kb.parenthesis    = None
+        kb.proxyAuthHeader = None
         kb.unionComment   = ""
         kb.unionCount     = None
         kb.unionPosition  = None
diff --git a/lib/request/connect.py b/lib/request/connect.py
index 3a6717556..a708e9d33 100644
--- a/lib/request/connect.py
+++ b/lib/request/connect.py
@@ -124,6 +124,9 @@ class Connect:
             if kb.authHeader:
                 headers["Authorization"] = kb.authHeader
 
+            if kb.proxyAuthHeader:
+                headers["Proxy-authorization"] = kb.proxyAuthHeader
+
             if auxHeaders:
                 for key, item in auxHeaders.items():
                     headers[key] = item
@@ -169,6 +172,9 @@ class Connect:
             if req.has_header("Authorization"):
                 kb.authHeader = req.headers["Authorization"]
 
+            if req.has_header("Proxy-authorization"):
+                kb.proxyAuthHeader = req.headers["Proxy-authorization"]
+
             if hasattr(conn, "redurl") and hasattr(conn, "redcode") and not conf.redirectHandled:
                 msg  = "sqlmap got a %d redirect to " % conn.redcode
                 msg += "%s - What target address do you " % conn.redurl