diff --git a/plugins/dbms/mysql/takeover.py b/plugins/dbms/mysql/takeover.py
index e6e79e3db..4457c9493 100644
--- a/plugins/dbms/mysql/takeover.py
+++ b/plugins/dbms/mysql/takeover.py
@@ -78,10 +78,10 @@ class Takeover(GenericTakeover):
         self.udfSharedLibName = "libs%s" % randomStr(lowercase=True)
 
         if Backend.isOs(OS.WINDOWS):
-            self.udfLocalFile += "/mysql/windows/%d/lib_mysqludf_sys.dll" % Backend.getArch()
+            self.udfLocalFile = os.path.join(self.udfLocalFile, "mysql", "windows", "%d" % Backend.getArch(), "lib_mysqludf_sys.dll")
             self.udfSharedLibExt = "dll"
         else:
-            self.udfLocalFile += "/mysql/linux/%d/lib_mysqludf_sys.so" % Backend.getArch()
+            self.udfLocalFile = os.path.join(self.udfLocalFile, "mysql", "linux", "%d" % Backend.getArch(), "lib_mysqludf_sys.so")
             self.udfSharedLibExt = "so"
 
     def udfCreateFromSharedLib(self, udf, inpRet):
diff --git a/plugins/dbms/postgresql/takeover.py b/plugins/dbms/postgresql/takeover.py
index b310c43cd..0c3a41584 100644
--- a/plugins/dbms/postgresql/takeover.py
+++ b/plugins/dbms/postgresql/takeover.py
@@ -58,10 +58,10 @@ class Takeover(GenericTakeover):
             raise SqlmapUnsupportedFeatureException(errMsg)
 
         if Backend.isOs(OS.WINDOWS):
-            self.udfLocalFile += "/postgresql/windows/%d/%s/lib_postgresqludf_sys.dll" % (Backend.getArch(), majorVer)
+            self.udfLocalFile = os.path.join(self.udfLocalFile, "postgresql", "windows", "%d" % Backend.getArch(), majorVer, "lib_postgresqludf_sys.dll")
             self.udfSharedLibExt = "dll"
         else:
-            self.udfLocalFile += "/postgresql/linux/%d/%s/lib_postgresqludf_sys.so" % (Backend.getArch(), majorVer)
+            self.udfLocalFile = os.path.join(self.udfLocalFile, "postgresql", "linux", "%d" % Backend.getArch(), majorVer, "lib_postgresqludf_sys.so")
             self.udfSharedLibExt = "so"
 
     def udfCreateFromSharedLib(self, udf, inpRet):