diff --git a/YACReader/main.cpp b/YACReader/main.cpp
index 0bfe0a21..521c9dbf 100644
--- a/YACReader/main.cpp
+++ b/YACReader/main.cpp
@@ -98,7 +98,9 @@ int main(int argc, char *argv[])
     QApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
     QApplication::setHighDpiScaleFactorRoundingPolicy(Qt::HighDpiScaleFactorRoundingPolicy::PassThrough);
 
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     QImageReader::setAllocationLimit(0);
+#endif
 
 #if defined(_MSC_VER) && defined(_DEBUG)
     _CrtSetDbgFlag(_CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF);
diff --git a/YACReaderLibrary/main.cpp b/YACReaderLibrary/main.cpp
index 29586e9e..70e01b25 100644
--- a/YACReaderLibrary/main.cpp
+++ b/YACReaderLibrary/main.cpp
@@ -131,7 +131,9 @@ int main(int argc, char **argv)
     QApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
     QApplication::setHighDpiScaleFactorRoundingPolicy(Qt::HighDpiScaleFactorRoundingPolicy::PassThrough);
 
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     QImageReader::setAllocationLimit(0);
+#endif
 
     QApplication app(argc, argv);
 
diff --git a/YACReaderLibraryServer/main.cpp b/YACReaderLibraryServer/main.cpp
index 28ee5cf3..bda5e416 100644
--- a/YACReaderLibraryServer/main.cpp
+++ b/YACReaderLibraryServer/main.cpp
@@ -82,7 +82,9 @@ int main(int argc, char **argv)
 
     QCoreApplication app(argc, argv);
 
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     QImageReader::setAllocationLimit(0);
+#endif
 
     app.setApplicationName("YACReaderLibrary");
     app.setOrganizationName("YACReader");