diff --git a/doc/Doxyfile b/doc/Doxyfile
index 08d4f8c3..c32d0f89 100644
--- a/doc/Doxyfile
+++ b/doc/Doxyfile
@@ -203,7 +203,7 @@ TAB_SIZE               = 8
 # For example adding "sideeffect=\par Side Effects:\n" will allow you to 
 # put the command \sideeffect (or @sideeffect) in the documentation, which 
 # will result in a user-defined paragraph with heading "Side Effects:". 
-# You can put \n's in the value part of an alias to insert newlines.
+# You can put \n in the value part of an alias to insert newlines.
 
 ALIASES                = 
 
diff --git a/src/init.cpp b/src/init.cpp
index 172e66a2..4d016956 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -78,7 +78,7 @@ void Shutdown(void* parg)
         printf("Bitcoin exiting\n\n");
         fExit = true;
 #ifndef QT_GUI
-        // ensure non-UI client get's exited here, but let Bitcoin-Qt reach return 0; in bitcoin.cpp
+        // ensure non-UI client gets exited here, but let Bitcoin-Qt reach 'return 0;' in bitcoin.cpp
         exit(0);
 #endif
     }
diff --git a/src/qt/bitcoin.cpp b/src/qt/bitcoin.cpp
index 6debec70..debd2805 100644
--- a/src/qt/bitcoin.cpp
+++ b/src/qt/bitcoin.cpp
@@ -213,7 +213,7 @@ int main(int argc, char *argv[])
                 window.hide();
                 guiref = 0;
             }
-            // Shutdown the core and it's threads, but don't exit Bitcoin-Qt here
+            // Shutdown the core and its threads, but don't exit Bitcoin-Qt here
             Shutdown(NULL);
         }
         else
diff --git a/src/qt/bitcoinunits.cpp b/src/qt/bitcoinunits.cpp
index 9a9a4890..d4715aba 100644
--- a/src/qt/bitcoinunits.cpp
+++ b/src/qt/bitcoinunits.cpp
@@ -99,7 +99,7 @@ QString BitcoinUnits::format(int unit, qint64 n, bool fPlus)
     QString quotient_str = QString::number(quotient);
     QString remainder_str = QString::number(remainder).rightJustified(num_decimals, '0');
 
-    // Right-trim excess 0's after the decimal point
+    // Right-trim excess zeros after the decimal point
     int nTrim = 0;
     for (int i = remainder_str.size()-1; i>=2 && (remainder_str.at(i) == '0'); --i)
         ++nTrim;