diff -ur qp9.1.orig/src/pile.h qp9.1/src/pile.h
--- qp9.1.orig/src/pile.h	2011-08-23 01:17:44.000000000 +0200
+++ qp9.1/src/pile.h	2013-01-09 12:07:44.000000000 +0100
@@ -75,7 +75,7 @@
 	//
 	// Push a StoredType onto the pile.
 	//
-	void	push(const StoredType s){ pushElement(s); }
+	void	push(const StoredType s){ this->pushElement(s); }
 
 	//
 	// Pop a StoredType off the pile.
@@ -85,7 +85,7 @@
 	//
 	// Pop n entries of StoredType off the pile.
 	//
-	void	popNEntries(word32 n)	{ setTopOfStack(this->getTopOfStack() - n); }
+	void	popNEntries(word32 n)	{ this->setTopOfStack(this->getTopOfStack() - n); }
 
 	//
 	// Check whether the pile is empty or not.
diff -ur qp9.1.orig/src/system_support.cc qp9.1/src/system_support.cc
--- qp9.1.orig/src/system_support.cc	2011-08-23 01:17:44.000000000 +0200
+++ qp9.1/src/system_support.cc	2013-01-09 12:07:16.000000000 +0100
@@ -61,6 +61,8 @@
 #include <iostream>
 #ifdef WIN32
 #include <direct.h>
+#else
+#include <unistd.h>
 #endif //WIN32
 
 using namespace std;