diff --git a/CMakeLists.txt b/CMakeLists.txt
index 93d61eca..a18f7402 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -40,7 +40,6 @@ endif()
 option(BUILD_SHARED_LIBS "Build shared libraries" ON)
 option(LIBXSLT_WITH_DEBUGGER "Add the debugging support" ON)
 option(LIBXSLT_WITH_CRYPTO "Add crypto support to exslt" OFF)
-option(LIBXSLT_WITH_MEM_DEBUG "Add the memory debugging module" OFF)
 option(LIBXSLT_WITH_MODULES "Add the module support" ON)
 option(LIBXSLT_WITH_PROFILER "Add the profiling support" ON)
 option(LIBXSLT_WITH_PYTHON "Build Python bindings" ON)
@@ -76,7 +75,7 @@ if(LIBXSLT_WITH_THREADS)
 	find_package(Threads REQUIRED)
 endif()
 
-foreach(VARIABLE IN ITEMS WITH_CRYPTO WITH_DEBUGGER WITH_MEM_DEBUG WITH_MODULES WITH_PROFILER WITH_PYTHON WITH_TRIO WITH_XSLT_DEBUG)
+foreach(VARIABLE IN ITEMS WITH_CRYPTO WITH_DEBUGGER WITH_MODULES WITH_PROFILER WITH_PYTHON WITH_TRIO WITH_XSLT_DEBUG)
 	if(LIBXSLT_${VARIABLE})
 		set(${VARIABLE} 1)
 	else()
diff --git a/configure.ac b/configure.ac
index 0131754f..bf9d8ec8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -253,15 +253,6 @@ else
 fi
 AC_SUBST(WITH_XSLT_DEBUG)
 
-AC_ARG_WITH(mem_debug, [  --with-mem-debug        Add the memory debugging module (off)])
-if test "$with_mem_debug" = "yes" ; then
-    echo Enabling memory debug support
-    WITH_MEM_DEBUG=1
-else    
-    WITH_MEM_DEBUG=0
-fi
-AC_SUBST(WITH_MEM_DEBUG)
-
 dnl 
 dnl Is debugger support requested
 dnl
diff --git a/libxslt/xsltconfig.h.in b/libxslt/xsltconfig.h.in
index e115e496..c595b6ee 100644
--- a/libxslt/xsltconfig.h.in
+++ b/libxslt/xsltconfig.h.in
@@ -54,26 +54,6 @@ extern "C" {
 #define WITH_XSLT_DEBUG
 #endif
 
-#if @WITH_MEM_DEBUG@
-/**
- * DEBUG_MEMORY:
- *
- * should be activated only when debugging libxslt. It replaces the
- * allocator with a collect and debug shell to the libc allocator.
- * Use configure --with-mem-debug to activate it on both library
- */
-#define DEBUG_MEMORY
-
-/**
- * DEBUG_MEMORY_LOCATION:
- *
- * should be activated only when debugging libxslt.
- * DEBUG_MEMORY_LOCATION should be activated only when libxml has
- * been configured with --with-debug-mem too
- */
-#define DEBUG_MEMORY_LOCATION
-#endif
-
 /**
  * XSLT_NEED_TRIO:
  *
diff --git a/python/libxslt.c b/python/libxslt.c
index c11dc57e..5445e4b6 100644
--- a/python/libxslt.c
+++ b/python/libxslt.c
@@ -51,13 +51,6 @@ __inline int c99_vsnprintf(char *outBuf, size_t size, const char *format, va_lis
 #define vsnprintf trio_vsnprintf
 #endif
 
-/* #define DEBUG */
-/* #define DEBUG_XPATH */
-/* #define DEBUG_ERROR */
-/* #define DEBUG_MEMORY */
-/* #define DEBUG_EXTENSIONS */
-/* #define DEBUG_EXTENSIONS */
-
 #if PY_MAJOR_VERSION >= 3
 PyObject* PyInit_libxsltmod(void);
 #else
diff --git a/win32/configure.js b/win32/configure.js
index 22f65593..53be2ba2 100644
--- a/win32/configure.js
+++ b/win32/configure.js
@@ -180,7 +180,6 @@ function discoverVersion()
 	cf.Close();
 	vf.WriteLine("WITH_TRIO=" + (withTrio? "1" : "0"));
 	vf.WriteLine("WITH_DEBUG=" + (withXsltDebug? "1" : "0"));
-	vf.WriteLine("WITH_MEM_DEBUG=" + (withMemDebug? "1" : "0"));
 	vf.WriteLine("WITH_DEBUGGER=" + (withDebugger? "1" : "0"));
 	vf.WriteLine("WITH_ICONV=" + (withIconv? "1" : "0"));
 	vf.WriteLine("WITH_ZLIB=" + (withZlib? "1" : "0"));
@@ -230,8 +229,6 @@ function configureXslt()
 			of.WriteLine(s.replace(/\@WITH_TRIO\@/, withTrio? "1" : "0"));
 		} else if (s.search(/\@WITH_XSLT_DEBUG\@/) != -1) {
 			of.WriteLine(s.replace(/\@WITH_XSLT_DEBUG\@/, withXsltDebug? "1" : "0"));
-		} else if (s.search(/\@WITH_MEM_DEBUG\@/) != -1) {
-			of.WriteLine(s.replace(/\@WITH_MEM_DEBUG\@/, withMemDebug? "1" : "0"));
 		} else if (s.search(/\@WITH_DEBUGGER\@/) != -1) {
 			of.WriteLine(s.replace(/\@WITH_DEBUGGER\@/, withDebugger? "1" : "0"));
 		} else if (s.search(/\@WITH_MODULES\@/) != -1) {
@@ -303,8 +300,6 @@ function configureLibxsltPy()
 			of.WriteLine(s.replace(/\@WITH_TRIO\@/, withTrio? "1" : "0"));
 		} else if (s.search(/\@WITH_XSLT_DEBUG\@/) != -1) {
 			of.WriteLine(s.replace(/\@WITH_XSLT_DEBUG\@/, withXsltDebug? "1" : "0"));
-		} else if (s.search(/\@WITH_MEM_DEBUG\@/) != -1) {
-			of.WriteLine(s.replace(/\@WITH_MEM_DEBUG\@/, withMemDebug? "1" : "0"));
 		} else if (s.search(/\@WITH_DEBUGGER\@/) != -1) {
 			of.WriteLine(s.replace(/\@WITH_DEBUGGER\@/, withDebugger? "1" : "0"));
 		} else if (s.search(/\@WITH_MODULES\@/) != -1) {