diff --git a/common_arm/ldscript.common b/common_arm/ldscript.common
index c94d0dcff..8400f740a 100644
--- a/common_arm/ldscript.common
+++ b/common_arm/ldscript.common
@@ -10,6 +10,7 @@ ms of the GNU GPL, version 2 or,
 */
 
 stacksize = DEFINED(stacksize) ? stacksize : 4K;
+commonareasize = 0x20;
 
 /* AT91SAM7S256 has 256k Flash and 64k RAM */
 /* AT91SAM7S512 has 512k Flash and 64k RAM */
@@ -17,12 +18,12 @@ stacksize = DEFINED(stacksize) ? stacksize : 4K;
 /* osimage space =   (512k - 0x2000 == 524288 - 8192 == 516096bytes == 0x7E000 ) */
 MEMORY
 {
-    bootphase1 : ORIGIN = 0x00100000, LENGTH = 0x200             /* Phase 1 bootloader: Copies real bootloader to RAM */
-    bootphase2 : ORIGIN = 0x00100200, LENGTH = 0x2000 - 0x200    /* Main bootloader code, stored in Flash, executed from RAM */
-    osimage    : ORIGIN = 0x00102000, LENGTH = 512K - 0x2000     /* Place where the main OS will end up */
-    ram        : ORIGIN = 0x00200000, LENGTH = 64K - 0x20        /* RAM, minus small common area */
-    stack      : ORIGIN = 0x00200000 + 64K - 4K - 0x20, LENGTH = stacksize /* Stack */
-    commonarea : ORIGIN = 0x00200000 + 64K - 0x20, LENGTH = 0x20 /* Communication between bootloader and main OS */
+    bootphase1 : ORIGIN = 0x00100000, LENGTH = 0x200                                        /* Phase 1 bootloader: Copies real bootloader to RAM */
+    bootphase2 : ORIGIN = 0x00100200, LENGTH = 0x2000 - 0x200                               /* Main bootloader code, stored in Flash, executed from RAM */
+    osimage    : ORIGIN = 0x00102000, LENGTH = 512K - 0x2000                                /* Place where the main OS will end up */
+    ram        : ORIGIN = 0x00200000, LENGTH = 64K - commonareasize                         /* RAM, minus small common area */
+    stack      : ORIGIN = 0x00200000 + 64K - stacksize - commonareasize, LENGTH = stacksize /* Stack */
+    commonarea : ORIGIN = 0x00200000 + 64K - commonareasize, LENGTH = commonareasize        /* Communication between bootloader and main OS */
 }
 
 /* Export some information that can be used from within the firmware */