diff --git a/krArc/krarc.cpp b/krArc/krarc.cpp
--- a/krArc/krarc.cpp
+++ b/krArc/krarc.cpp
@@ -1722,6 +1722,9 @@
 
 void kio_krarcProtocol::checkIf7zIsEncrypted(bool &encrypted, QString fileName)
 {
+    // Reminder: If that function is modified, it's important to research if the
+    // changes must also be applied to `KRarcHandler::checkIf7zIsEncrypted()`
+
     KRFUNC;
     if (encryptedArchPath == fileName)
         encrypted = true;
@@ -1753,6 +1756,9 @@
 
 void kio_krarcProtocol::check7zOutputForPassword(KProcess * proc, QByteArray & buf)
 {
+    // Reminder: If that function is modified, it's important to research if the
+    // changes must also be applied to `Kr7zEncryptionChecker::receivedOutput()`
+
     KRFUNC;
     QString data =  QString(buf);
 
@@ -1869,6 +1875,10 @@
 
 QString kio_krarcProtocol::fullPathName(const QString& name)
 {
+    // Reminder: If that function is modified, it's important to research if the
+    // changes must also be applied to `KrServices::fullPathName()`
+    // and `KrServices::cmdExist()`
+
     // Note: KRFUNC was not used here in order to avoid filling the log with too much information
     KRDEBUG(name);
 
diff --git a/krusader/Archive/kr7zencryptionchecker.cpp b/krusader/Archive/kr7zencryptionchecker.cpp
--- a/krusader/Archive/kr7zencryptionchecker.cpp
+++ b/krusader/Archive/kr7zencryptionchecker.cpp
@@ -36,6 +36,9 @@
 
 void Kr7zEncryptionChecker::receivedOutput()
 {
+    // Reminder: If that function is modified, it's important to research if the
+    // changes must also be applied to `kio_krarcProtocol::check7zOutputForPassword()`
+
     QString data = QString::fromLocal8Bit(this->readAllStandardOutput());
 
     QString checkable = lastData + data;
diff --git a/krusader/Archive/krarchandler.cpp b/krusader/Archive/krarchandler.cpp
--- a/krusader/Archive/krarchandler.cpp
+++ b/krusader/Archive/krarchandler.cpp
@@ -658,6 +658,9 @@
 
 void KRarcHandler::checkIf7zIsEncrypted(bool &encrypted, QString fileName)
 {
+    // Reminder: If that function is modified, it's important to research if the
+    // changes must also be applied to `kio_krarcProtocol::checkIf7zIsEncrypted()`
+
     Kr7zEncryptionChecker proc;
     // TODO incorporate all this in Kr7zEncryptionChecker
     proc << KrServices::fullPathName("7z") << "-y" << "t";
diff --git a/krusader/krservices.cpp b/krusader/krservices.cpp
--- a/krusader/krservices.cpp
+++ b/krusader/krservices.cpp
@@ -89,6 +89,10 @@
 
 bool KrServices::cmdExist(const QString& cmdName)
 {
+    // Reminder: If that function is modified, it's important to research if the
+    // changes must also be applied to `KrServices::fullPathName()`
+    // and `kio_krarcProtocol::fullPathName()`
+
     KConfigGroup group(krConfig, "Dependencies");
     if (QFile(group.readEntry(cmdName, QString())).exists())
         return true;
@@ -98,6 +102,10 @@
 
 QString KrServices::fullPathName(const QString& name, QString confName)
 {
+    // Reminder: If that function is modified, it's important to research if the
+    // changes must also be applied to `kio_krarcProtocol::fullPathName()`
+    // and `KrServices::cmdExist()`
+
     QString supposedName;
 
     if (confName.isNull())