diff --git a/epan/dissectors/packet-per.c b/epan/dissectors/packet-per.c
index 3606866804..cabcd66200 100644
--- a/epan/dissectors/packet-per.c
+++ b/epan/dissectors/packet-per.c
@@ -81,7 +81,7 @@ static gint ett_per_External_encoding = -1;
 typedef enum {
   CB_ASN1_ENC,
   CB_DISSECTOR,
-  CB_NEW_DISSECTOR,
+  CB_NEW_DISSECTOR
 } type_cb_variant;
 
 /*
diff --git a/epan/dissectors/packet-smb2.h b/epan/dissectors/packet-smb2.h
index 9904dae781..899be07765 100644
--- a/epan/dissectors/packet-smb2.h
+++ b/epan/dissectors/packet-smb2.h
@@ -45,7 +45,7 @@ typedef enum {
 	SMB2_EI_NONE,		/* Unassigned / NULL */
 	SMB2_EI_TREENAME,	/* tid tracking  char * */
 	SMB2_EI_FILENAME,	/* fid tracking  char * */
-	SMB2_EI_FINDPATTERN,	/* find tracking  char * */
+	SMB2_EI_FINDPATTERN	/* find tracking  char * */
 } smb2_extra_info_t;
 typedef struct _smb2_saved_info_t {
 	guint8 class;
diff --git a/plugins/opcua/opcua_complextypeparser.c b/plugins/opcua/opcua_complextypeparser.c
index dc1034fb43..11efbf3cff 100644
--- a/plugins/opcua/opcua_complextypeparser.c
+++ b/plugins/opcua/opcua_complextypeparser.c
@@ -1742,7 +1742,7 @@ static gint *ett[] =
   &ett_opcua_TransferResult,
 };
 
-void registerComplexTypes()
+void registerComplexTypes(void)
 {
   proto_register_subtree_array(ett, array_length(ett));
 }
diff --git a/plugins/opcua/opcua_complextypeparser.h b/plugins/opcua/opcua_complextypeparser.h
index cb689d94e1..ad05992caa 100644
--- a/plugins/opcua/opcua_complextypeparser.h
+++ b/plugins/opcua/opcua_complextypeparser.h
@@ -150,4 +150,4 @@ void parseNotificationMessage(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, ch
 void parseMonitoredItemNotification(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, char *szFieldName);
 void parseDataChangeNotification(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, char *szFieldName);
 void parseTransferResult(proto_tree *tree, tvbuff_t *tvb, gint *pOffset, char *szFieldName);
-void registerComplexTypes();
+void registerComplexTypes(void);
diff --git a/plugins/opcua/opcua_serviceparser.c b/plugins/opcua/opcua_serviceparser.c
index b8bed4dec5..4efba325a8 100644
--- a/plugins/opcua/opcua_serviceparser.c
+++ b/plugins/opcua/opcua_serviceparser.c
@@ -977,7 +977,7 @@ static gint *ett[] =
   &ett_opcua_DeleteSubscriptionsResponse,
 };
 
-void registerServiceTypes()
+void registerServiceTypes(void)
 {
   proto_register_subtree_array(ett, array_length(ett));
 }
diff --git a/plugins/opcua/opcua_serviceparser.h b/plugins/opcua/opcua_serviceparser.h
index c1db9f4178..b6b57d1f75 100644
--- a/plugins/opcua/opcua_serviceparser.h
+++ b/plugins/opcua/opcua_serviceparser.h
@@ -104,4 +104,4 @@ void parseTransferSubscriptionsRequest(proto_tree *tree, tvbuff_t *tvb, gint *pO
 void parseTransferSubscriptionsResponse(proto_tree *tree, tvbuff_t *tvb, gint *pOffset);
 void parseDeleteSubscriptionsRequest(proto_tree *tree, tvbuff_t *tvb, gint *pOffset);
 void parseDeleteSubscriptionsResponse(proto_tree *tree, tvbuff_t *tvb, gint *pOffset);
-void registerServiceTypes();
+void registerServiceTypes(void);