diff --git a/pcbnew/pcbnew.cpp b/pcbnew/pcbnew.cpp
index 44f6837571..c48526e12f 100644
--- a/pcbnew/pcbnew.cpp
+++ b/pcbnew/pcbnew.cpp
@@ -40,9 +40,10 @@ bool g_TwoSegmentTrackBuild = TRUE;
 bool g_HightLigt_Status;
 extern PARAM_CFG_BASE* ParamCfgList[];
 
-char* buf_work = NULL;      /* pointeur sur le buffer de travail */
-char* adr_lowmem = NULL;    /* adresse de base memoire de calcul disponible*/
-char* adr_max = NULL;       /* adresse haute maxi utilisee pour la memoire */
+/* A buffer used in some computations (will be removed in next cleanup code,
+ * DO NOT use) */
+#define BUFMEMSIZE 256000    /* buffer size (in bytes) */
+char* adr_lowmem = NULL;
 
 int Angle_Rot_Module;
 int ModuleSegmentWidth;
@@ -141,8 +142,7 @@ Changing extension to .brd." ),
 
     /* allocation de la memoire pour le fichier et autres buffers: */
     /* On reserve BUFMEMSIZE octets de ram pour calcul */
-    buf_work  = adr_lowmem = (char*) MyZMalloc( BUFMEMSIZE );   /* adresse de la zone de calcul */
-    adr_max   = adr_lowmem;
+    adr_lowmem = (char*) MyZMalloc( BUFMEMSIZE );   /* adresse de la zone de calcul */
 
     if( adr_lowmem == NULL )
     {
diff --git a/pcbnew/pcbnew.h b/pcbnew/pcbnew.h
index cf1a21158c..2b734c5857 100644
--- a/pcbnew/pcbnew.h
+++ b/pcbnew/pcbnew.h
@@ -82,14 +82,6 @@ extern bool     Segments_45_Only;
 extern wxString g_Shapes3DExtBuffer;
 extern wxString g_DocModulesFileName;
 
-/* A buffer used in some computations (will be removed in next cleanup code,
- * do not use) */
-#define BUFMEMSIZE 256000    /* buffer size (in bytes) */
-extern char*    buf_work;    /* pointeur sur le buffer de travail */
-extern char*    adr_lowmem;  /* adresse de base memoire de calcul disponible*/
-extern char*    adr_himem;   /* adresse haute limite de la memoire disponible*/
-extern char*    adr_max;     /* adresse haute maxi utilisee pour la memoire */
-
 /* Variables used in footprint handling */
 extern int      Angle_Rot_Module;
 extern wxSize   ModuleTextSize;  /* Default footprint texts size */
diff --git a/pcbnew/ratsnest.cpp b/pcbnew/ratsnest.cpp
index 4374fd5cd1..fb2bb6b083 100644
--- a/pcbnew/ratsnest.cpp
+++ b/pcbnew/ratsnest.cpp
@@ -13,6 +13,8 @@
 
 #include "protos.h"
 
+extern char*    adr_lowmem;  /* adresse de base memoire de calcul disponible */
+
 /* exported variables */
 CHEVELU*    g_pt_chevelu;
 CHEVELU*    local_liste_chevelu;    // Buffer address for local ratsnest
@@ -566,7 +568,6 @@ void WinEDA_BasePcbFrame::Build_Board_Ratsnest( wxDC* DC )
 
     m_Pcb->m_NbNoconnect = noconn;
     m_Pcb->m_Status_Pcb |= LISTE_CHEVELU_OK;
-    adr_lowmem = buf_work;
 
     // erase the ratsnest displayed on screen if needed
     CHEVELU* Chevelu = (CHEVELU*) m_Pcb->m_Ratsnest;
@@ -1002,8 +1003,6 @@ void WinEDA_BasePcbFrame::build_liste_pads()
         }
     }
 
-    adr_lowmem = buf_work;
-
     if( m_Pcb->m_Ratsnest )
     {
         MyFree( m_Pcb->m_Ratsnest );
@@ -1247,9 +1246,6 @@ calcul_chevelu_ext:
         local_chevelu++;
     }
 
-    /* return the new free memory buffer address, in the general buffer */
-    adr_max = MAX( adr_max, (char*) (local_chevelu + 1) );
-
     return (char*) (local_chevelu + 1);   /* the struct pointed by local_chevelu is used
     in temporary computations, so we skip it
     */