diff --git a/include/microkernel/base_api.h b/include/microkernel/base_api.h
index 7ec8f7a1c23..c7b46ec8b09 100644
--- a/include/microkernel/base_api.h
+++ b/include/microkernel/base_api.h
@@ -112,7 +112,7 @@ struct k_task {
 	ktask_t id;
 	uint32_t state;
 	uint32_t group;
-	void (*fstart)(void);
+	void (*fn_start)(void);
 	char *workspace;
 	int worksize;
 	void (*fabort)(void);
diff --git a/include/microkernel/task.h b/include/microkernel/task.h
index 37d9cb50326..efaa977443e 100644
--- a/include/microkernel/task.h
+++ b/include/microkernel/task.h
@@ -110,16 +110,16 @@ extern void task_group_leave(uint32_t groups);
  * @param priority Priority of task.
  * @param state State of task.
  * @param groups Groups this task belong to.
- * @param fstart Entry function.
+ * @param fn_start Entry function.
  * @param workspace Pointer to workspace (aka, stack).
  * @param worksize Size of workspace.
  * @param fabort Abort function.
  */
 #define __K_TASK_INITIALIZER(ident, priority, state, groups, \
-			     fstart, workspace, worksize, fabort) \
+			     fn_start, workspace, worksize, fabort) \
 	{ \
 	  NULL, NULL, priority, ident, state, ((groups) ^ SYS), \
-	  fstart, workspace, worksize, fabort, NULL, \
+	  fn_start, workspace, worksize, fabort, NULL, \
 	}
 
 /**
diff --git a/kernel/microkernel/k_task.c b/kernel/microkernel/k_task.c
index 8df707eb095..16558672460 100644
--- a/kernel/microkernel/k_task.c
+++ b/kernel/microkernel/k_task.c
@@ -333,7 +333,7 @@ void _k_task_op(struct k_args *A)
 
 		switch (A->Args.g1.opt) {
 		case TASK_START:
-			start_task(X, X->fstart);
+			start_task(X, X->fn_start);
 			break;
 		case TASK_ABORT:
 			abort_task(X);
@@ -400,7 +400,7 @@ void _k_task_group_op(struct k_args *A)
 		if (X->group & grp) {
 			switch (opt) {
 			case TASK_GROUP_START:
-				start_task(X, X->fstart);
+				start_task(X, X->fn_start);
 				break;
 			case TASK_GROUP_ABORT:
 				abort_task(X);
@@ -599,6 +599,6 @@ void task_entry_set(ktask_t task,       /* task */
 {
 	struct k_task *X = (struct k_task *)task;
 
-	X->fstart = func;
+	X->fn_start = func;
 }