diff --git a/src/libs/qmljs/qmljsdocument.cpp b/src/libs/qmljs/qmljsdocument.cpp
index c848a78c537..659531f1306 100644
--- a/src/libs/qmljs/qmljsdocument.cpp
+++ b/src/libs/qmljs/qmljsdocument.cpp
@@ -265,6 +265,11 @@ public:
         addLocation(line, column);
     }
 
+    void pragmaLibrary() override
+    {
+        isLibrary = true;
+    }
+
     virtual QList<SourceLocation> locations() { return _locations; }
 
     const QString documentPath;
diff --git a/src/libs/qmljs/qmljsreformatter.cpp b/src/libs/qmljs/qmljsreformatter.cpp
index d60d6179f3d..6fdb6b034fc 100644
--- a/src/libs/qmljs/qmljsreformatter.cpp
+++ b/src/libs/qmljs/qmljsreformatter.cpp
@@ -24,8 +24,9 @@
 ****************************************************************************/
 
 #include "qmljsreformatter.h"
-
 #include "qmljscodeformatter.h"
+#include "qmljsbind.h"
+
 #include "parser/qmljsast_p.h"
 #include "parser/qmljsastvisitor_p.h"
 #include "parser/qmljsengine_p.h"
@@ -122,6 +123,10 @@ public:
 
 
         // emit directives
+        if (_doc->bind()->isJsLibrary()) {
+            out(QLatin1String(".pragma library"));
+            newLine();
+        }
         const QList<SourceLocation> &directives = _doc->jsDirectives();
         for (const auto &d: directives) {
             quint32 line = 1;
diff --git a/tests/auto/qml/reformatter/pragmalibrary.js b/tests/auto/qml/reformatter/pragmalibrary.js
new file mode 100644
index 00000000000..15c30ca07e5
--- /dev/null
+++ b/tests/auto/qml/reformatter/pragmalibrary.js
@@ -0,0 +1,3 @@
+.pragma library
+
+function foo() {}