diff --git a/src/modules/partition/core/OsproberEntry.h b/src/modules/partition/core/OsproberEntry.h
index 792f22b29..e8c7895f0 100644
--- a/src/modules/partition/core/OsproberEntry.h
+++ b/src/modules/partition/core/OsproberEntry.h
@@ -1,6 +1,7 @@
 /* === This file is part of Calamares - <https://github.com/calamares> ===
  *
  *   Copyright 2014-2016, Teo Mrnjavac <teo@kde.org>
+ *   Copyright 2018, Adriaan de Groot <groot@kde.org>
  *
  *   Calamares is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -29,6 +30,18 @@ struct FstabEntry
     QString options;
     int dump;
     int pass;
+
+    /// Does this entry make sense and is it complete?
+    bool isValid() const; // implemented in Partutils.cpp
+
+    /** @brief Create an entry from a live of /etc/fstab
+     *
+     * Splits the given string (which ought to follow the format
+     * of /etc/fstab) and returns a corresponding Fstab entry.
+     * If the string isn't valid (e.g. comment-line, or broken
+     * fstab entry) then the entry that is returned is invalid.
+     */
+    static FstabEntry fromEtcFstab( const QString& ); // implemented in Partutils.cpp
 };
 
 typedef QList< FstabEntry > FstabEntryList;
diff --git a/src/modules/partition/core/PartUtils.cpp b/src/modules/partition/core/PartUtils.cpp
index e36798cdc..d7c543bd2 100644
--- a/src/modules/partition/core/PartUtils.cpp
+++ b/src/modules/partition/core/PartUtils.cpp
@@ -164,7 +164,7 @@ lookForFstabEntries( const QString& partitionPath )
 {
     FstabEntryList fstabEntries;
     QTemporaryDir mountsDir;
-    mountsDir.setAutoRemove(false); // Avoid data cleanup - https://github.com/calamares/calamares/issues/1044
+    mountsDir.setAutoRemove( false );
 
     int exit = QProcess::execute( "mount", { partitionPath, mountsDir.path() } );
     if ( !exit ) // if all is well
@@ -176,28 +176,17 @@ lookForFstabEntries( const QString& partitionPath )
                                      .split( '\n' );
 
             for ( const QString& rawLine : fstabLines )
-            {
-                QString line = rawLine.simplified();
-                if ( line.startsWith( '#' ) )
-                    continue;
-
-                QStringList splitLine = line.split( ' ' );
-                if ( splitLine.length() != 6 )
-                    continue;
-
-                fstabEntries.append( { splitLine.at( 0 ), // path, or UUID, or LABEL, etc.
-                                       splitLine.at( 1 ), // mount point
-                                       splitLine.at( 2 ), // fs type
-                                       splitLine.at( 3 ), // options
-                                       splitLine.at( 4 ).toInt(), //dump
-                                       splitLine.at( 5 ).toInt()  //pass
-                                     } );
-            }
-
+                fstabEntries.append( FstabEntry::fromEtcFstab( rawLine ) );
             fstabFile.close();
+            std::remove_if( fstabEntries.begin(), fstabEntries.end(), [](const FstabEntry& x) { return !x.isValid(); } );
         }
 
-        QProcess::execute( "umount", { "-R", mountsDir.path() } );
+        if ( QProcess::execute( "umount", { "-R", mountsDir.path() } ) )
+        {
+            cWarning() << "Could not unmount" << mountsDir.path();
+            // There is stuff left in there, really don't remove
+            mountsDir.setAutoRemove( false );
+        }
     }
 
     return fstabEntries;
@@ -374,3 +363,31 @@ isEfiBootable( const Partition* candidate )
 }
 
 }  // nmamespace PartUtils
+
+/* Implementation of methods for FstabEntry, from OsproberEntry.h */
+
+bool
+FstabEntry::isValid() const
+{
+    return !partitionNode.isEmpty() && !mountPoint.isEmpty() && !fsType.isEmpty();
+}
+
+FstabEntry
+FstabEntry::fromEtcFstab( const QString& rawLine )
+{
+    QString line = rawLine.simplified();
+    if ( line.startsWith( '#' ) )
+        return FstabEntry{ QString(), QString(), QString(), QString(), 0, 0 };
+
+    QStringList splitLine = line.split( ' ' );
+    if ( splitLine.length() != 6 )
+        return FstabEntry{ QString(), QString(), QString(), QString(), 0, 0 };
+
+    return FstabEntry{ splitLine.at( 0 ), // path, or UUID, or LABEL, etc.
+                       splitLine.at( 1 ), // mount point
+                       splitLine.at( 2 ), // fs type
+                       splitLine.at( 3 ), // options
+                       splitLine.at( 4 ).toInt(), //dump
+                       splitLine.at( 5 ).toInt()  //pass
+                       };
+ }