diff --git a/targets/TARGET_NXP/TARGET_LPC176X/device/TOOLCHAIN_ARM_STD/LPC1768.sct b/targets/TARGET_NXP/TARGET_LPC176X/device/TOOLCHAIN_ARM_STD/LPC1768.sct
index 93cb66b643..1d0665204d 100644
--- a/targets/TARGET_NXP/TARGET_LPC176X/device/TOOLCHAIN_ARM_STD/LPC1768.sct
+++ b/targets/TARGET_NXP/TARGET_LPC176X/device/TOOLCHAIN_ARM_STD/LPC1768.sct
@@ -8,11 +8,22 @@
   #define MBED_APP_SIZE 0x80000
 #endif
 
+#if !defined(MBED_RAM_START)
+  #define MBED_RAM_START 0x10000000
+#endif
+
+#if !defined(MBED_RAM_SIZE)
+  #define MBED_RAM_SIZE 0x00008000
+#endif
+
 #if !defined(MBED_BOOT_STACK_SIZE)
   #define MBED_BOOT_STACK_SIZE 0x400
 #endif
 
-#define Stack_Size MBED_BOOT_STACK_SIZE
+; 8_byte_aligned(49 vect * 4 bytes) =  8_byte_aligned(0xC4) = 0xC8
+#define VECTOR_SIZE                 0xC8
+
+#define RAM_FIXED_SIZE              (MBED_BOOT_STACK_SIZE+VECTOR_SIZE+0x20)
 
 LR_IROM1 MBED_APP_START MBED_APP_SIZE  {    ; load region size_region
   ER_IROM0 MBED_APP_START 0x2FC  {  ; load address = execution address
@@ -28,20 +39,21 @@ LR_IROM1 MBED_APP_START MBED_APP_SIZE  {    ; load region size_region
   }
   ; 8_byte_aligned(49 vect * 4 bytes) =  8_byte_aligned(0xC4) = 0xC8
   ; 32KB (RAM size) - 0xC8 (NIVT) - 32 (topmost 32 bytes used by IAP functions) = 0x7F18
-  RW_IRAM1 0x100000C8 0x7F18-Stack_Size  {
-   .ANY1 (+RW +ZI)
+  RW_IRAM1  (MBED_RAM_START+VECTOR_SIZE)  (MBED_RAM_SIZE-VECTOR_SIZE-0x20)  {  ; RW data
+   .ANY (+RW +ZI)
   }
-  ARM_LIB_STACK (0x100000C8+0x7F18) EMPTY -Stack_Size { ; stack
+  ARM_LIB_HEAP  AlignExpr(+0, 16)  EMPTY  (MBED_RAM_SIZE-RAM_FIXED_SIZE+MBED_RAM_START-AlignExpr(ImageLimit(RW_IRAM1), 16))  {
   }
-  RW_IRAM2 0x2007C000 0x4000  {  ; RW data, ETH RAM
+  RW_IRAM2 0x2007C000 0x4000  {  ; RW data, USB RAM
    .ANY (AHBSRAM0)
-   .ANY2 (+RW +ZI)
   }
   RW_IRAM3 0x20080000 0x4000  {  ; RW data, ETH RAM
    .ANY (AHBSRAM1)
-   .ANY3 (+RW +ZI)
   }
   RW_IRAM4 0x40038000 0x0800  {  ; RW data, CAN RAM
    .ANY (CANRAM)
   }
+
+  ARM_LIB_STACK  (MBED_RAM_START+MBED_RAM_SIZE)  EMPTY  -MBED_BOOT_STACK_SIZE { ; stack
+  }
 }