diff --git a/src/Magnum/Audio/AbstractImporter.cpp b/src/Magnum/Audio/AbstractImporter.cpp
index 11cca8e5f..6b2e19d40 100644
--- a/src/Magnum/Audio/AbstractImporter.cpp
+++ b/src/Magnum/Audio/AbstractImporter.cpp
@@ -25,6 +25,7 @@
 
 #include "AbstractImporter.h"
 
+#include <string>
 #include <Corrade/Containers/Array.h>
 #include <Corrade/Containers/EnumSet.hpp>
 #include <Corrade/Containers/Optional.h>
diff --git a/src/Magnum/Audio/AbstractImporter.h b/src/Magnum/Audio/AbstractImporter.h
index 73cdc6586..150640904 100644
--- a/src/Magnum/Audio/AbstractImporter.h
+++ b/src/Magnum/Audio/AbstractImporter.h
@@ -30,6 +30,7 @@
  */
 
 #include <Corrade/PluginManager/AbstractManagingPlugin.h>
+#include <Corrade/Utility/StlForwardString.h>
 
 #include "Magnum/Magnum.h"
 #include "Magnum/Audio/BufferFormat.h"
diff --git a/src/Magnum/ShaderTools/AbstractConverter.h b/src/Magnum/ShaderTools/AbstractConverter.h
index 556533510..6202e16bb 100644
--- a/src/Magnum/ShaderTools/AbstractConverter.h
+++ b/src/Magnum/ShaderTools/AbstractConverter.h
@@ -32,6 +32,7 @@
 
 #include <Corrade/Containers/EnumSet.h>
 #include <Corrade/PluginManager/AbstractManagingPlugin.h>
+#include <Corrade/Utility/StlForwardString.h> /** @todo remove once file callbacks are std::string-free */
 
 #include "Magnum/Magnum.h"
 #include "Magnum/ShaderTools/ShaderTools.h"