diff --git a/include/shell/shell.h b/include/shell/shell.h
index 7092c550aa3..bbb4c60c45e 100644
--- a/include/shell/shell.h
+++ b/include/shell/shell.h
@@ -500,7 +500,7 @@ struct shell_stats {
 	u32_t log_lost_cnt; /*!< Lost log counter.*/
 };
 
-#if CONFIG_SHELL_STATS
+#ifdef CONFIG_SHELL_STATS
 #define SHELL_STATS_DEFINE(_name) static struct shell_stats _name##_stats
 #define SHELL_STATS_PTR(_name) (&(_name##_stats))
 #else
diff --git a/include/shell/shell_history.h b/include/shell/shell_history.h
index 9db81438c2a..2ce6a8d9bc0 100644
--- a/include/shell/shell_history.h
+++ b/include/shell/shell_history.h
@@ -29,7 +29,7 @@ struct shell_history_item {
 	char data[];
 };
 
-#if CONFIG_SHELL_HISTORY
+#ifdef CONFIG_SHELL_HISTORY
 #define SHELL_HISTORY_DEFINE(_name, block_size, block_count)	\
 								\
 	K_MEM_SLAB_DEFINE(_name##_history_memslab,		\
diff --git a/include/shell/shell_log_backend.h b/include/shell/shell_log_backend.h
index 9e937f96518..01fdb1ed081 100644
--- a/include/shell/shell_log_backend.h
+++ b/include/shell/shell_log_backend.h
@@ -64,7 +64,7 @@ int shell_log_backend_output_func(u8_t *data, size_t length, void *ctx);
  *
  *  @param _name Shell name.
  */
-#if CONFIG_LOG
+#ifdef CONFIG_LOG
 #define SHELL_LOG_BACKEND_DEFINE(_name, _buf, _size, _queue_size, _timeout)  \
 	LOG_BACKEND_DEFINE(_name##_backend, log_backend_shell_api, false);   \
 	K_MSGQ_DEFINE(_name##_msgq, sizeof(struct shell_log_backend_msg),    \