--- plasma-4.0.1/plasma/plasma/plasmaapp.cpp	2008-02-21 10:57:28 +0100
+++ plasma-4.0.1/plasma/plasma/plasmaapp.cpp	2008-02-21 11:00:40 +0100
@@ -49,6 +49,11 @@
 #include <X11/Xlib.h>
 #include <X11/extensions/Xrender.h>
 
+#ifndef _SC_PHYS_PAGES
+#include <sys/param.h>
+#include <sys/sysctl.h>
+#endif
+
 Display* dpy = 0;
 Colormap colormap = 0;
 Visual *visual = 0;
@@ -139,8 +144,18 @@
     cacheSize += cacheSize / 10;
 
     // Calculate the size of physical system memory
-    int memorySize = sysconf(_SC_PHYS_PAGES);
-    memorySize *= sysconf(_SC_PAGESIZE) / 1024;
+#ifdef _SC_PHYS_PAGES
+	int memorySize = sysconf(_SC_PHYS_PAGES);
+	memorySize *= sysconf(_SC_PAGESIZE) / 1024;
+#else
+	size_t memorySize;
+	size_t len;
+	static int mib[]={ CTL_HW, HW_PHYSMEM };
+
+	len = sizeof(memorySize);
+	sysctl(mib, 2, &memorySize, &len, NULL, 0);
+	memorySize /= 1024;
+#endif
 
     // Increase the pixmap cache size to 1% of system memory if it isn't already
     // larger so as to maximize cache usage. 1% of 1GB ~= 10MB.