diff --git a/lcl/interfaces/qt5/qt56.pas b/lcl/interfaces/qt5/qt56.pas
index 5df7b140e5..c4ffcb0418 100644
--- a/lcl/interfaces/qt5/qt56.pas
+++ b/lcl/interfaces/qt5/qt56.pas
@@ -8961,6 +8961,8 @@ procedure QIcon_setThemeSearchPaths(searchpath: QStringListH); cdecl; external Q
 procedure QIcon_themeName(retval: PWideString); cdecl; external Qt5PasLib name 'QIcon_themeName';
 procedure QIcon_setThemeName(path: PWideString); cdecl; external Qt5PasLib name 'QIcon_setThemeName';
 
+procedure QPixmapCache_Clear(); cdecl; external Qt5PasLib name 'QPixmapCache_Clear';
+
 function QPixmap_Create(): QPixmapH; cdecl; external Qt5PasLib name 'QPixmap_Create';
 procedure QPixmap_Destroy(handle: QPixmapH); cdecl; external Qt5PasLib name 'QPixmap_Destroy'; 
 function QPixmap_Create(w: Integer; h: Integer): QPixmapH; cdecl; external Qt5PasLib name 'QPixmap_Create2';