diff --git a/src/buffer/katesecuretextbuffer.cpp b/src/buffer/katesecuretextbuffer.cpp
--- a/src/buffer/katesecuretextbuffer.cpp
+++ b/src/buffer/katesecuretextbuffer.cpp
@@ -139,7 +139,7 @@
 
 bool SecureTextBuffer::moveFile(const QString &sourceFile, const QString &targetFile)
 {
-#ifndef Q_OS_WIN
+#if !defined(Q_OS_WIN) && !defined(Q_OS_ANDROID)
     const int result = std::rename(QFile::encodeName(sourceFile).constData(), QFile::encodeName(targetFile).constData());
     if (result == 0) {
         syncToDisk(QFile(targetFile).handle());
diff --git a/src/document/katedocument.cpp b/src/document/katedocument.cpp
--- a/src/document/katedocument.cpp
+++ b/src/document/katedocument.cpp
@@ -2193,6 +2193,13 @@
 }
 //END: error
 
+#ifdef Q_OS_ANDROID
+int log2(double d) {
+    int result;
+    std::frexp(d, &result);
+    return result-1;
+}
+#endif
 
 void KTextEditor::DocumentPrivate::openWithLineLengthLimitOverride()
 {