diff --git a/lib/checkio.cpp b/lib/checkio.cpp
index 00d593018..b262e4225 100644
--- a/lib/checkio.cpp
+++ b/lib/checkio.cpp
@@ -255,6 +255,11 @@ void CheckIO::checkFileUsage()
                 }
             }
         }
+        for (std::map<unsigned int, Filepointer>::iterator i = filepointers.begin(); i != filepointers.end(); ++i) {
+            i->second.op_indent = 0;
+            i->second.mode = UNKNOWN;
+            i->second.lastOperation = Filepointer::UNKNOWN_OP;
+        }
     }
 }
 
diff --git a/test/testio.cpp b/test/testio.cpp
index cc487447c..c80bf15dd 100644
--- a/test/testio.cpp
+++ b/test/testio.cpp
@@ -287,6 +287,43 @@ private:
               "    fclose(f[0]);\n"
               "}");
         ASSERT_EQUALS("", errout.str());
+
+        // #4368: multiple functions
+        check("static FILE *fp = NULL;\n"
+              "\n"
+              "void close()\n"
+              "{\n"
+              "  fclose(fp);\n"
+              "}\n"
+              "\n"
+              "void dump()\n"
+              "{\n"
+              "  if (fp == NULL) return;\n"
+              "  fprintf(fp, \"Here's the output.\\n\");\n"
+              "}\n"
+              "\n"
+              "int main()\n"
+              "{\n"
+              "  fp = fopen(\"test.txt\", \"w\");\n"
+              "  dump();\n"
+              "  close();\n"
+              "  return 0;\n"
+              "}");
+        ASSERT_EQUALS("", errout.str());
+
+        check("static FILE *fp = NULL;\n"
+              "\n"
+              "void close()\n"
+              "{\n"
+              "  fclose(fp);\n"
+              "}\n"
+              "\n"
+              "void dump()\n"
+              "{\n"
+              "  fclose(fp);\n"
+              "  fprintf(fp, \"Here's the output.\\n\");\n"
+              "}");
+        ASSERT_EQUALS("[test.cpp:11]: (error) Used file that is not opened.\n", errout.str());
     }
 
     void fileIOwithoutPositioning() {