diff --git a/qmake/generators/metamakefile.cpp b/qmake/generators/metamakefile.cpp
index c9235509f26..79443a1d4ba 100644
--- a/qmake/generators/metamakefile.cpp
+++ b/qmake/generators/metamakefile.cpp
@@ -140,7 +140,10 @@ BuildsMetaMakefileGenerator::write()
                 if(Option::output.fileName() == "-") {
                     Option::output.setFileName("");
                     Option::output_dir = qmake_getpwd();
-                    Option::output.open(stdout, QIODevice::WriteOnly | QIODevice::Text);
+                    if (!Option::output.open(stdout, QIODevice::WriteOnly | QIODevice::Text)) {
+                        fprintf(stderr, "Failure to open stdout\n");
+                        return false;
+                    }
                     using_stdout = true;
                 } else {
                     if(Option::output.fileName().isEmpty() &&
diff --git a/qmake/generators/win32/msbuild_objectmodel.cpp b/qmake/generators/win32/msbuild_objectmodel.cpp
index 7cbb44dde4f..3147f24961f 100644
--- a/qmake/generators/win32/msbuild_objectmodel.cpp
+++ b/qmake/generators/win32/msbuild_objectmodel.cpp
@@ -512,7 +512,10 @@ void VCXProjectWriter::write(XmlOutput &xml, VCProjectSingleConfig &tool)
 
     QFile filterFile;
     filterFile.setFileName(Option::output.fileName().append(".filters"));
-    filterFile.open(QIODevice::WriteOnly | QIODevice::Text | QIODevice::Truncate);
+    if (!filterFile.open(QIODevice::WriteOnly | QIODevice::Text | QIODevice::Truncate)) {
+        warn_msg(WarnLogic, "Generator: cannot open output filter file");
+        return;
+    }
     QTextStream ts(&filterFile);
     XmlOutput xmlFilter(ts, XmlOutput::NoConversion);
 
@@ -751,7 +754,10 @@ void VCXProjectWriter::write(XmlOutput &xml, VCProject &tool)
     // The file filters are added in a separate file for MSBUILD.
     QFile filterFile;
     filterFile.setFileName(Option::output.fileName().append(".filters"));
-    filterFile.open(QIODevice::WriteOnly | QIODevice::Text | QIODevice::Truncate);
+    if (filterFile.open(QIODevice::WriteOnly | QIODevice::Text | QIODevice::Truncate)) {
+        warn_msg(WarnLogic, "Cannot open output filter file");
+        return;
+    }
     QTextStream ts(&filterFile);
     XmlOutput xmlFilter(ts, XmlOutput::NoConversion);