diff --git a/src/gui/util/qastchandler.cpp b/src/gui/util/qastchandler.cpp
index 94cb42e29b3..19d6325f033 100644
--- a/src/gui/util/qastchandler.cpp
+++ b/src/gui/util/qastchandler.cpp
@@ -59,6 +59,8 @@ struct AstcHeader
     quint8 zSize[3];
 };
 
+QAstcHandler::~QAstcHandler() = default;
+
 bool QAstcHandler::canRead(const QByteArray &suffix, const QByteArray &block)
 {
     Q_UNUSED(suffix);
diff --git a/src/gui/util/qastchandler_p.h b/src/gui/util/qastchandler_p.h
index 398f1833b62..2b9cbc5b547 100644
--- a/src/gui/util/qastchandler_p.h
+++ b/src/gui/util/qastchandler_p.h
@@ -59,6 +59,7 @@ class QAstcHandler : public QTextureFileHandler
 {
 public:
     using QTextureFileHandler::QTextureFileHandler;
+    ~QAstcHandler() override;
 
     static bool canRead(const QByteArray &suffix, const QByteArray &block);
 
diff --git a/src/gui/util/qktxhandler.cpp b/src/gui/util/qktxhandler.cpp
index 9f4545f3af4..2ab67d7c15d 100644
--- a/src/gui/util/qktxhandler.cpp
+++ b/src/gui/util/qktxhandler.cpp
@@ -111,6 +111,8 @@ constexpr quint32 withPadding(quint32 value, quint32 rounding)
     return value + (rounding - 1) - ((value + (rounding - 1)) % rounding);
 }
 
+QKtxHandler::~QKtxHandler() = default;
+
 bool QKtxHandler::canRead(const QByteArray &suffix, const QByteArray &block)
 {
     Q_UNUSED(suffix);
diff --git a/src/gui/util/qktxhandler_p.h b/src/gui/util/qktxhandler_p.h
index 4298433f367..b45115d3d9d 100644
--- a/src/gui/util/qktxhandler_p.h
+++ b/src/gui/util/qktxhandler_p.h
@@ -61,6 +61,7 @@ class QKtxHandler : public QTextureFileHandler
 {
 public:
     using QTextureFileHandler::QTextureFileHandler;
+    ~QKtxHandler() override;
 
     static bool canRead(const QByteArray &suffix, const QByteArray &block);
 
diff --git a/src/gui/util/qpkmhandler.cpp b/src/gui/util/qpkmhandler.cpp
index 9b1337a658f..7741f56afda 100644
--- a/src/gui/util/qpkmhandler.cpp
+++ b/src/gui/util/qpkmhandler.cpp
@@ -65,6 +65,8 @@ static constexpr PkmType typeMap[5] = {
     { 0x9276,  8 }    // GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2
 };
 
+QPkmHandler::~QPkmHandler() = default;
+
 bool QPkmHandler::canRead(const QByteArray &suffix, const QByteArray &block)
 {
     Q_UNUSED(suffix);
diff --git a/src/gui/util/qpkmhandler_p.h b/src/gui/util/qpkmhandler_p.h
index 2f7618bc532..ea77443cd7f 100644
--- a/src/gui/util/qpkmhandler_p.h
+++ b/src/gui/util/qpkmhandler_p.h
@@ -59,6 +59,7 @@ class QPkmHandler : public QTextureFileHandler
 {
 public:
     using QTextureFileHandler::QTextureFileHandler;
+    ~QPkmHandler() override;
 
     static bool canRead(const QByteArray &suffix, const QByteArray &block);
 
diff --git a/src/gui/util/qtexturefilehandler_p.h b/src/gui/util/qtexturefilehandler_p.h
index 3d4f42526fe..b0d28b87b1e 100644
--- a/src/gui/util/qtexturefilehandler_p.h
+++ b/src/gui/util/qtexturefilehandler_p.h
@@ -63,7 +63,7 @@ public:
     {
         m_logName = !logName.isEmpty() ? logName : QByteArrayLiteral("(unknown)");
     }
-    virtual ~QTextureFileHandler() {}
+    virtual ~QTextureFileHandler();
 
     virtual QTextureFileData read() = 0;
     QIODevice *device() const { return m_device; }
diff --git a/src/gui/util/qtexturefilereader.cpp b/src/gui/util/qtexturefilereader.cpp
index fefb957323c..b71edcd5047 100644
--- a/src/gui/util/qtexturefilereader.cpp
+++ b/src/gui/util/qtexturefilereader.cpp
@@ -47,6 +47,8 @@
 
 QT_BEGIN_NAMESPACE
 
+QTextureFileHandler::~QTextureFileHandler() = default;
+
 QTextureFileReader::QTextureFileReader(QIODevice *device, const QString &fileName)
     : m_device(device), m_fileName(fileName)
 {