diff --git a/src/common/defs.h b/src/common/defs.h
index f62c3ce..bcf6f54 100644
--- a/src/common/defs.h
+++ b/src/common/defs.h
@@ -9,15 +9,6 @@
 #ifndef DEFS_H
 #define DEFS_H
 
-#ifdef FALSE
-#undef FALSE
-#endif
-#ifdef TRUE
-#undef TRUE
-#endif
-typedef enum { FALSE = 0, TRUE = 1 } Boolean;
-
-
 #define WPA_CIPHER_NONE BIT(0)
 #define WPA_CIPHER_WEP40 BIT(1)
 #define WPA_CIPHER_WEP104 BIT(2)
diff --git a/src/common/wpa_common.c b/src/common/wpa_common.c
index 46b647b..eb1861a 100644
--- a/src/common/wpa_common.c
+++ b/src/common/wpa_common.c
@@ -2655,10 +2655,9 @@
  * @pos: Pointer to the IE header
  * @end: Pointer to the end of the Key Data buffer
  * @ie: Pointer to parsed IE data
- * Returns: 0 on success, 1 if end mark is found, -1 on failure
  */
-static int wpa_parse_vendor_specific(const u8 *pos, const u8 *end,
-				     struct wpa_eapol_ie_parse *ie)
+static void wpa_parse_vendor_specific(const u8 *pos, const u8 *end,
+				      struct wpa_eapol_ie_parse *ie)
 {
 	unsigned int oui;
 
@@ -2666,7 +2665,7 @@
 		wpa_printf(MSG_MSGDUMP,
 			   "Too short vendor specific IE ignored (len=%u)",
 			   pos[1]);
-		return 1;
+		return;
 	}
 
 	oui = WPA_GET_BE24(&pos[2]);
@@ -2683,7 +2682,6 @@
 				    ie->wmm, ie->wmm_len);
 		}
 	}
-	return 0;
 }
 
 
@@ -2691,7 +2689,7 @@
  * wpa_parse_generic - Parse EAPOL-Key Key Data Generic IEs
  * @pos: Pointer to the IE header
  * @ie: Pointer to parsed IE data
- * Returns: 0 on success, 1 if end mark is found, -1 on failure
+ * Returns: 0 on success, 1 if end mark is found, 2 if KDE is not recognized
  */
 static int wpa_parse_generic(const u8 *pos, struct wpa_eapol_ie_parse *ie)
 {
@@ -2803,7 +2801,7 @@
 		return 0;
 	}
 
-	return 0;
+	return 2;
 }
 
 
@@ -2912,20 +2910,18 @@
 			}
 		} else if (*pos == WLAN_EID_VENDOR_SPECIFIC) {
 			ret = wpa_parse_generic(pos, ie);
-			if (ret < 0)
-				break;
-			if (ret > 0) {
+			if (ret == 1) {
+				/* end mark found */
 				ret = 0;
 				break;
 			}
 
-			ret = wpa_parse_vendor_specific(pos, end, ie);
-			if (ret < 0)
-				break;
-			if (ret > 0) {
-				ret = 0;
-				break;
+			if (ret == 2) {
+				/* not a known KDE */
+				wpa_parse_vendor_specific(pos, end, ie);
 			}
+
+			ret = 0;
 		} else {
 			wpa_hexdump(MSG_DEBUG,
 				    "WPA: Unrecognized EAPOL-Key Key Data IE",