diff --git a/stm32f10x_link.ld b/stm32f10x_link.ld
index 28047f0..0004e19 100644
--- a/stm32f10x_link.ld
+++ b/stm32f10x_link.ld
@@ -116,7 +116,11 @@ SECTIONS
 	{
 		end = . ;		  		 /* 'end' symbol defines heap location */
 		_end = end ;
+
+		. = ALIGN(4);
+		__heap_start = . ;
 		. = . + _min_heap_size;  /* Additional space for heap and stack */
+		__heap_end = . ;
 		. = . + _min_stack_size;
 	} > RAM