diff --git a/portable/MemMang/heap_4.c b/portable/MemMang/heap_4.c
index 90a20c5..834ba2e 100644
--- a/portable/MemMang/heap_4.c
+++ b/portable/MemMang/heap_4.c
@@ -494,7 +494,7 @@
          * is initialised automatically when the first allocation is made. */
         if( pxBlock != NULL )
         {
-            do
+            while( pxBlock != pxEnd )
             {
                 /* Increment the number of blocks and record the largest block seen
                  * so far. */
@@ -513,7 +513,7 @@
                 /* Move to the next block in the chain until the last block is
                  * reached. */
                 pxBlock = pxBlock->pxNextFreeBlock;
-            } while( pxBlock != pxEnd );
+            }
         }
     }
     ( void ) xTaskResumeAll();
diff --git a/portable/MemMang/heap_5.c b/portable/MemMang/heap_5.c
index 4fea255..193155a 100644
--- a/portable/MemMang/heap_5.c
+++ b/portable/MemMang/heap_5.c
@@ -544,7 +544,7 @@
          * is initialised automatically when the first allocation is made. */
         if( pxBlock != NULL )
         {
-            do
+            while( pxBlock != pxEnd )
             {
                 /* Increment the number of blocks and record the largest block seen
                  * so far. */
@@ -569,7 +569,7 @@
                 /* Move to the next block in the chain until the last block is
                  * reached. */
                 pxBlock = pxBlock->pxNextFreeBlock;
-            } while( pxBlock != pxEnd );
+            }
         }
     }
     ( void ) xTaskResumeAll();