diff --git a/qmake/doc/src/qmake-manual.qdoc b/qmake/doc/src/qmake-manual.qdoc
index c14615fdc5f..d772ba5fc18 100644
--- a/qmake/doc/src/qmake-manual.qdoc
+++ b/qmake/doc/src/qmake-manual.qdoc
@@ -1248,6 +1248,9 @@
             subproject.
     \row \li no_include_pwd \li Do not add the current directory to
             INCLUDEPATHS.
+    \row \li compile_included_sources \li By default, qmake does not
+             compile source files that are included in other source files. This
+             option disables this behavior.
     \endtable
 
     When you use the \c debug_and_release option (which is the default under
diff --git a/qmake/generators/makefile.cpp b/qmake/generators/makefile.cpp
index 1f60f292152..41525c5778b 100644
--- a/qmake/generators/makefile.cpp
+++ b/qmake/generators/makefile.cpp
@@ -943,6 +943,15 @@ MakefileGenerator::filterIncludedFiles(const char *var)
     inputs.removeIf(isIncluded);
 }
 
+void MakefileGenerator::processSources()
+{
+    if (project->isActiveConfig("compile_included_sources"))
+        return;
+
+    filterIncludedFiles("SOURCES");
+    filterIncludedFiles("GENERATED_SOURCES");
+}
+
 static QString
 qv(const ProString &val)
 {
diff --git a/qmake/generators/makefile.h b/qmake/generators/makefile.h
index 91016ff34d5..720599fd967 100644
--- a/qmake/generators/makefile.h
+++ b/qmake/generators/makefile.h
@@ -201,10 +201,7 @@ protected:
     virtual bool doDepends() const { return Option::mkfile::do_deps; }
 
     void filterIncludedFiles(const char *);
-    void processSources() {
-        filterIncludedFiles("SOURCES");
-        filterIncludedFiles("GENERATED_SOURCES");
-    }
+    void processSources();
 
     //for installs
     virtual QString defaultInstall(const QString &);