diff --git a/targets/TARGET_Silicon_Labs/TARGET_EFM32/TARGET_EFM32GG/device/TARGET_1024K/TOOLCHAIN_ARM_MICRO/efm32gg.sct b/targets/TARGET_Silicon_Labs/TARGET_EFM32/TARGET_EFM32GG/device/TARGET_1024K/TOOLCHAIN_ARM_MICRO/efm32gg.sct
index 94a7d23bfd..a39cec1c4a 100644
--- a/targets/TARGET_Silicon_Labs/TARGET_EFM32/TARGET_EFM32GG/device/TARGET_1024K/TOOLCHAIN_ARM_MICRO/efm32gg.sct
+++ b/targets/TARGET_Silicon_Labs/TARGET_EFM32/TARGET_EFM32GG/device/TARGET_1024K/TOOLCHAIN_ARM_MICRO/efm32gg.sct
@@ -32,6 +32,8 @@
 
 #define RAM_FIXED_SIZE              (MBED_CONF_TARGET_BOOT_STACK_SIZE+VECTOR_SIZE)
 
+#define MBED_RAM1_START (MBED_RAM_START+VECTOR_SIZE)
+
 LR_IROM1  MBED_APP_START  MBED_APP_SIZE  {    ; load region size_region
 
   ER_IROM1  MBED_APP_START  MBED_APP_SIZE  {  ; load address = execution address
@@ -40,11 +42,11 @@ LR_IROM1  MBED_APP_START  MBED_APP_SIZE  {    ; load region size_region
    .ANY (+RO)
   }
 
-  RW_IRAM1  (MBED_RAM_START+VECTOR_SIZE)  (MBED_RAM_SIZE-VECTOR_SIZE)  {  ; RW data
+  RW_IRAM1  MBED_RAM1_START  (MBED_RAM_SIZE-VECTOR_SIZE)  {  ; RW data
    .ANY (+RW +ZI)
   }
 
-  ARM_LIB_HEAP  AlignExpr(+0, 16)  EMPTY  (MBED_RAM_SIZE-RAM_FIXED_SIZE+MBED_RAM_START-AlignExpr(ImageLimit(RW_IRAM1), 16) - MBED_CONF_TARGET_BOOT_STACK_SIZE)  {
+  ARM_LIB_HEAP  AlignExpr(+0, 16)  EMPTY  (MBED_RAM_SIZE-RAM_FIXED_SIZE+MBED_RAM1_START-AlignExpr(ImageLimit(RW_IRAM1), 16))  {
   }
 
   ARM_LIB_STACK  (MBED_RAM_START+MBED_RAM_SIZE)  EMPTY  -MBED_CONF_TARGET_BOOT_STACK_SIZE { ; stack