diff --git a/src/Text/AbstractFontConverter.cpp b/src/Text/AbstractFontConverter.cpp
index 94c626c31..9da53d4aa 100644
--- a/src/Text/AbstractFontConverter.cpp
+++ b/src/Text/AbstractFontConverter.cpp
@@ -53,17 +53,29 @@ std::vector<std::pair<std::string, Containers::Array<unsigned char>>> AbstractFo
 }
 
 Containers::Array<unsigned char> AbstractFontConverter::exportFontToSingleData(AbstractFont* const font, GlyphCache* const cache, const std::string& characters) const {
+    #ifndef CORRADE_GCC45_COMPATIBILITY
     CORRADE_ASSERT(features() >= (Feature::ExportFont|Feature::ConvertData),
         "Text::AbstractFontConverter::exportFontToSingleData(): feature not supported", nullptr);
     CORRADE_ASSERT(!(features() & Feature::MultiFile),
         "Text::AbstractFontConverter::exportFontToSingleData(): the format is not single-file", nullptr);
+    #else
+    CORRADE_ASSERT(features() >= (Feature::ExportFont|Feature::ConvertData),
+        "Text::AbstractFontConverter::exportFontToSingleData(): feature not supported", {});
+    CORRADE_ASSERT(!(features() & Feature::MultiFile),
+        "Text::AbstractFontConverter::exportFontToSingleData(): the format is not single-file", {});
+    #endif
 
     return doExportFontToSingleData(font, cache, uniqueUnicode(characters));
 }
 
 Containers::Array<unsigned char> AbstractFontConverter::doExportFontToSingleData(AbstractFont*, GlyphCache*, const std::u32string&) const {
+    #ifndef CORRADE_GCC45_COMPATIBILITY
     CORRADE_ASSERT(false,
         "Text::AbstractFontConverter::exportFontToSingleData(): feature advertised but not implemented", nullptr);
+    #else
+    CORRADE_ASSERT(false,
+        "Text::AbstractFontConverter::exportFontToSingleData(): feature advertised but not implemented", {});
+    #endif
 }
 
 bool AbstractFontConverter::exportFontToFile(AbstractFont* const font, GlyphCache* const cache, const std::string& filename, const std::string& characters) const {
@@ -111,17 +123,29 @@ std::vector<std::pair<std::string, Containers::Array<unsigned char>>> AbstractFo
 }
 
 Containers::Array<unsigned char> AbstractFontConverter::exportGlyphCacheToSingleData(GlyphCache* cache) const {
+    #ifndef CORRADE_GCC45_COMPATIBILITY
     CORRADE_ASSERT(features() >= (Feature::ExportGlyphCache|Feature::ConvertData),
         "Text::AbstractFontConverter::exportGlyphCacheToSingleData(): feature not supported", nullptr);
     CORRADE_ASSERT(!(features() & Feature::MultiFile),
         "Text::AbstractFontConverter::exportGlyphCacheToSingleData(): the format is not single-file", nullptr);
+    #else
+    CORRADE_ASSERT(features() >= (Feature::ExportGlyphCache|Feature::ConvertData),
+        "Text::AbstractFontConverter::exportGlyphCacheToSingleData(): feature not supported", {});
+    CORRADE_ASSERT(!(features() & Feature::MultiFile),
+        "Text::AbstractFontConverter::exportGlyphCacheToSingleData(): the format is not single-file", {});
+    #endif
 
     return doExportGlyphCacheToSingleData(cache);
 }
 
 Containers::Array<unsigned char> AbstractFontConverter::doExportGlyphCacheToSingleData(GlyphCache*) const {
+    #ifndef CORRADE_GCC45_COMPATIBILITY
     CORRADE_ASSERT(false,
         "Text::AbstractFontConverter::exportGlyphCacheToSingleData(): feature advertised but not implemented", nullptr);
+    #else
+    CORRADE_ASSERT(false,
+        "Text::AbstractFontConverter::exportGlyphCacheToSingleData(): feature advertised but not implemented", {});
+    #endif
 }
 
 bool AbstractFontConverter::exportGlyphCacheToFile(GlyphCache* cache, const std::string& filename) const {
diff --git a/src/Trade/AbstractImageConverter.cpp b/src/Trade/AbstractImageConverter.cpp
index d0a465f68..cb54abc45 100644
--- a/src/Trade/AbstractImageConverter.cpp
+++ b/src/Trade/AbstractImageConverter.cpp
@@ -46,14 +46,23 @@ Image2D* AbstractImageConverter::doExportToImage(const Image2D*) const {
 }
 
 Containers::Array<unsigned char> AbstractImageConverter::exportToData(const Image2D* const image) const {
+    #ifndef CORRADE_GCC45_COMPATIBILITY
     CORRADE_ASSERT(features() & Feature::ConvertData,
         "Trade::AbstractImageConverter::exportToData(): feature not supported", nullptr);
+    #else
+    CORRADE_ASSERT(features() & Feature::ConvertData,
+        "Trade::AbstractImageConverter::exportToData(): feature not supported", {});
+    #endif
 
     return doExportToData(image);
 }
 
 Containers::Array<unsigned char> AbstractImageConverter::doExportToData(const Image2D*) const {
+    #ifndef CORRADE_GCC45_COMPATIBILITY
     CORRADE_ASSERT(false, "Trade::AbstractImageConverter::exportToData(): feature advertised but not implemented", nullptr);
+    #else
+    CORRADE_ASSERT(false, "Trade::AbstractImageConverter::exportToData(): feature advertised but not implemented", {});
+    #endif
 }
 
 bool AbstractImageConverter::exportToFile(const Image2D* const image, const std::string& filename) const {