diff --git a/lib/checknullpointer.cpp b/lib/checknullpointer.cpp
index e9b1467bd..bd36a4e37 100644
--- a/lib/checknullpointer.cpp
+++ b/lib/checknullpointer.cpp
@@ -485,6 +485,12 @@ void CheckNullPointer::nullPointerByDeRefAndChec()
                     break;
                 }
 
+                if (tok1->str() == ")" && Token::simpleMatch(tok1->link()->previous(), "sizeof ("))
+                {
+                    tok1 = tok1->link()->previous();
+                    continue;
+                }
+
                 if (tok1->str() == "break")
                     break;
 
diff --git a/test/testnullpointer.cpp b/test/testnullpointer.cpp
index 53198703c..0c9e09a1f 100644
--- a/test/testnullpointer.cpp
+++ b/test/testnullpointer.cpp
@@ -437,6 +437,15 @@ private:
               "    }\n"
               "}\n");
         ASSERT_EQUALS("", errout.str());
+
+        // #2525 - sizeof
+        check("void f() {\n"
+              "    int *test = NULL;\n"
+              "    int c = sizeof(test[0]);\n"
+              "    if (!test)\n"
+              "        ;\n"
+              "}\n");
+        ASSERT_EQUALS("", errout.str());
     }
 
     void nullpointer5()