diff --git a/wmi_unified_api.h b/wmi_unified_api.h
index a511146b82..7f73e897c4 100644
--- a/wmi_unified_api.h
+++ b/wmi_unified_api.h
@@ -35,7 +35,6 @@
 
 #include <osdep.h>
 #include "a_types.h"
-#include "ol_defines.h"
 #ifdef CONFIG_MCL
 #include "wmi.h"
 #endif
diff --git a/wmi_unified_param.h b/wmi_unified_param.h
index 9eb467b820..a8c4aac06f 100644
--- a/wmi_unified_param.h
+++ b/wmi_unified_param.h
@@ -302,6 +302,19 @@
 #define MAX_ASSOC_IE_LENGTH 1024
 typedef uint32_t TARGET_INIT_STATUS;
 
+/**
+ * @brief Opaque handle of wmi structure
+ */
+struct wmi_unified;
+typedef struct wmi_unified *wmi_unified_t;
+
+typedef void *ol_scn_t;
+/**
+ * @wmi_event_handler function prototype
+ */
+typedef int (*wmi_unified_event_handler)(ol_scn_t scn_handle,
+		 uint8_t *event_buf, uint32_t len);
+
 typedef enum {
 	WMI_HOST_MODE_11A	= 0,   /* 11a Mode */
 	WMI_HOST_MODE_11G	= 1,   /* 11b/g Mode */