diff --git a/arch/sim/src/sim/sim_heap.c b/arch/sim/src/sim/sim_heap.c
index 79c5e4bd81..ac1828dcd8 100644
--- a/arch/sim/src/sim/sim_heap.c
+++ b/arch/sim/src/sim/sim_heap.c
@@ -213,7 +213,7 @@ static void mm_delayfree(struct mm_heap_s *heap, void *mem, bool delay)
  ****************************************************************************/
 
 struct mm_heap_s *mm_initialize(const char *name,
-                                    void *heap_start, size_t heap_size)
+                                void *heap_start, size_t heap_size)
 {
   struct mm_heap_s *heap;
 
@@ -599,18 +599,7 @@ void up_allocate_heap(void **heap_start, size_t *heap_size)
 
 void up_allocate_heap(void **heap_start, size_t *heap_size)
 {
-  /* Note: Some subsystems like modlib and binfmt need to allocate
-   * executable memory.
-   */
-
-  /* We make the entire heap executable here to keep
-   * the sim simpler. If it turns out to be a problem, the
-   * ARCH_HAVE_TEXT_HEAP mechanism can be an alternative.
-   */
-
-  uint8_t *sim_heap = host_allocheap(SIM_HEAP_SIZE, false);
-
-  *heap_start = sim_heap;
+  *heap_start = host_allocheap(SIM_HEAP_SIZE, false);
   *heap_size  = SIM_HEAP_SIZE;
 }
 
diff --git a/arch/sim/src/sim/sim_internal.h b/arch/sim/src/sim/sim_internal.h
index c5869bfd3c..7b18ed4c32 100644
--- a/arch/sim/src/sim/sim_internal.h
+++ b/arch/sim/src/sim/sim_internal.h
@@ -216,7 +216,7 @@ int   host_waitpid(pid_t pid);
 
 /* sim_hostmemory.c *********************************************************/
 
-void *host_allocheap(size_t sz, bool exec);
+void *host_allocheap(size_t size, bool exec);
 void  host_freeheap(void *mem);
 void *host_allocshmem(const char *name, size_t size, int master);
 void  host_freeshmem(void *mem);
diff --git a/arch/sim/src/sim/win/sim_hostmemory.c b/arch/sim/src/sim/win/sim_hostmemory.c
index b900b9792d..3eaafa0006 100644
--- a/arch/sim/src/sim/win/sim_hostmemory.c
+++ b/arch/sim/src/sim/win/sim_hostmemory.c
@@ -36,9 +36,9 @@
  *
  ****************************************************************************/
 
-void *host_allocheap(size_t sz, bool exec)
+void *host_allocheap(size_t size, bool exec)
 {
-  return _aligned_malloc(sz, 8);
+  return _aligned_malloc(size, 8);
 }
 
 /****************************************************************************