diff --git a/ChangeLog b/ChangeLog
index 62ad88c3f..ffe61c9d2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,6 @@
+2009-01-09 Dietmar Warning
+ * src/misc/alloc.c, src/frontend/outitf.c: heap only needed under windows for zoom
+
 2009-01-05 Dietmar Warning
  * src/math/misc/isinf.c, isnan.c, src/include/missing_math.h: small polish for 
    HAVE_DECL_XXX macros, more elaborate isinf function
diff --git a/src/frontend/outitf.c b/src/frontend/outitf.c
index f71eb6ca1..53be1bdec 100644
--- a/src/frontend/outitf.c
+++ b/src/frontend/outitf.c
@@ -66,7 +66,7 @@ static void freeRun(runDesc *run);
 
 /* plot output data shall go into extra heap 
    to prevent massive memory fragmentation of standard process heap */
-#if defined(_MSC_VER) || defined(__MINGW32__)
+#if defined HAS_WINDOWS && (defined(_MSC_VER) || defined(__MINGW32__))
 #define newrealloc hrealloc
 #else
 #define newrealloc trealloc
diff --git a/src/misc/alloc.c b/src/misc/alloc.c
index 719e673d5..d712464c0 100644
--- a/src/misc/alloc.c
+++ b/src/misc/alloc.c
@@ -6,25 +6,22 @@ $Id$
 /*
  * Memory alloction functions
  */
-#include <config.h>
+#include "ngspice.h"
 
 #ifndef HAVE_LIBGC
-#include <ngspice.h>
-#include <stdio.h>
-#include <memory.h>
 
 /*saj For Tcl module locking*/
 #ifdef TCL_MODULE
 #include <tcl.h>
-//#include <tclDecls.h>
 #endif
 
-
+#ifdef HAS_WINDOWS
 #if defined(_MSC_VER) || defined(__MINGW32__)
 #undef BOOLEAN
 #include <windows.h>
 extern HANDLE outheap;
 #endif
+#endif
 
 /* Malloc num bytes and initialize to zero. Fatal error if the space can't
  * be tmalloc'd.   Return NULL for a request for 0 bytes.
@@ -59,6 +56,54 @@ tmalloc(size_t num)
     return(s);
 }
 
+/* Original Berkeley Implementation */
+/*
+void *
+tmalloc(size_t num)
+{
+     void *s;
+
+    if (!num)
+	return NULL;
+
+    s = malloc((unsigned) num);
+    if (!s) {
+        fprintf(stderr, 
+		"malloc: Internal Error: can't allocate %d bytes.\n", num);
+        exit(EXIT_BAD);
+    }
+
+    bzero(s, num);
+
+    return(s);
+}
+
+void *
+trealloc(void *str, size_t num)
+{
+    void *s;
+
+    if (!num) {
+	if (str)
+		free(str);
+	return NULL;
+    }
+
+    if (!str)
+	s = tmalloc(num);
+    else
+        s = realloc(str, (unsigned) num);
+
+    if (!s) {
+        fprintf(stderr, 
+		"realloc: Internal Error: can't allocate %d bytes.\n", num);
+        exit(EXIT_BAD);
+    }
+    return(s);
+}
+
+*/
+
 void *
 trealloc(void *ptr, size_t num)
 {
@@ -98,6 +143,7 @@ trealloc(void *ptr, size_t num)
    Function is used in outitf.c to prevent heap fragmentation 
    An additional heap outheap is used to store the plot output data.
 */
+#ifdef HAS_WINDOWS
 #if defined(_MSC_VER) || defined(__MINGW32__)
 void *
 hrealloc(void *ptr, size_t num)
@@ -134,56 +180,7 @@ hrealloc(void *ptr, size_t num)
   return(s);
 }
 #endif
-
-
-
-/* Original Berkeley Implementation */
-/*
-void *
-tmalloc(size_t num)
-{
-     void *s;
-
-    if (!num)
-	return NULL;
-
-    s = malloc((unsigned) num);
-    if (!s) {
-        fprintf(stderr, 
-		"malloc: Internal Error: can't allocate %d bytes.\n", num);
-        exit(EXIT_BAD);
-    }
-
-    bzero(s, num);
-
-    return(s);
-}
-
-void *
-trealloc(void *str, size_t num)
-{
-    void *s;
-
-    if (!num) {
-	if (str)
-		free(str);
-	return NULL;
-    }
-
-    if (!str)
-	s = tmalloc(num);
-    else
-        s = realloc(str, (unsigned) num);
-
-    if (!s) {
-        fprintf(stderr, 
-		"realloc: Internal Error: can't allocate %d bytes.\n", num);
-        exit(EXIT_BAD);
-    }
-    return(s);
-}
-
-*/
+#endif
 
 
 void