diff --git a/cli/cmdlineparser.cpp b/cli/cmdlineparser.cpp
index 0792dfde3..a02447c8f 100644
--- a/cli/cmdlineparser.cpp
+++ b/cli/cmdlineparser.cpp
@@ -296,18 +296,6 @@ bool CmdLineParser::ParseFromArgs(int argc, const char* const argv[])
             else if (std::strcmp(argv[i], "-q") == 0 || std::strcmp(argv[i], "--quiet") == 0)
                 _settings->quiet = true;
 
-            // Append user-defined code to checked source code
-            else if (std::strncmp(argv[i], "--append=", 9) == 0) {
-                // This is deprecated and will be removed in 1.80
-                PrintMessage("cppcheck: '--append' is deprecated and will be removed in version 1.80. To supply additional information to cppcheck, use --library or --include.");
-
-                const std::string filename = 9 + argv[i];
-                if (!_settings->append(filename)) {
-                    PrintMessage("cppcheck: Couldn't open the file: \"" + filename + "\".");
-                    return false;
-                }
-            }
-
             // Check configuration
             else if (std::strcmp(argv[i], "--check-config") == 0) {
                 _settings->checkConfiguration = true;
diff --git a/lib/cppcheck.cpp b/lib/cppcheck.cpp
index eb1695920..94b070f0d 100644
--- a/lib/cppcheck.cpp
+++ b/lib/cppcheck.cpp
@@ -272,7 +272,6 @@ unsigned int CppCheck::processFile(const std::string& filename, const std::strin
                 Timer t("Preprocessor::getcode", _settings.showtime, &S_timerResults);
                 codeWithoutCfg = preprocessor.getcode(tokens1, cfg, files, true);
             }
-            codeWithoutCfg += _settings.append();
 
             if (_settings.preprocessOnly) {
                 if (codeWithoutCfg.compare(0,5,"#file") == 0)
diff --git a/lib/settings.cpp b/lib/settings.cpp
index eface7a01..600decb6a 100644
--- a/lib/settings.cpp
+++ b/lib/settings.cpp
@@ -129,22 +129,3 @@ bool Settings::isEnabled(Severity::SeverityType severity) const
         return false;
     }
 }
-
-bool Settings::append(const std::string &filename)
-{
-    std::ifstream fin(filename.c_str());
-    if (!fin.is_open()) {
-        return false;
-    }
-    std::string line;
-    while (std::getline(fin, line)) {
-        _append += line + "\n";
-    }
-    Preprocessor::preprocessWhitespaces(_append);
-    return true;
-}
-
-const std::string &Settings::append() const
-{
-    return _append;
-}
diff --git a/lib/settings.h b/lib/settings.h
index 9bae5e84e..13dba8703 100644
--- a/lib/settings.h
+++ b/lib/settings.h
@@ -56,9 +56,6 @@ public:
     };
 
 private:
-    /** @brief Code to append in the checks */
-    std::string _append;
-
     /** @brief enable extra checks by id */
     int _enabled;
 
@@ -161,12 +158,6 @@ public:
         for finding include files inside source files. (-I) */
     std::list<std::string> includePaths;
 
-    /** @brief assign append code (--append) */
-    bool append(const std::string &filename);
-
-    /** @brief get append code (--append) */
-    const std::string &append() const;
-
     /** @brief Maximum number of configurations to check before bailing.
         Default is 12. (--max-configs=N) */
     unsigned int maxConfigs;