diff --git a/epan/dissectors/packet-etch.c b/epan/dissectors/packet-etch.c
index 3a71fc9453..f3396f70a0 100644
--- a/epan/dissectors/packet-etch.c
+++ b/epan/dissectors/packet-etch.c
@@ -200,7 +200,7 @@ gbl_symbols_free(void)
 }
 
 static void
-gbl_symbols_array_append(int hash, gchar *symbol)
+gbl_symbols_array_append(guint32 hash, gchar *symbol)
 {
   value_string vs = {hash, symbol};
   DISSECTOR_ASSERT(gbl_symbols_array != NULL);
@@ -292,7 +292,7 @@ add_symbols_of_file(const char *filename)
   if (pFile != NULL) {
     char line[256];
     while (fgets(line, sizeof line, pFile) != NULL) {
-      int    hash;
+      unsigned int hash;
       size_t length, pos;
 
       length = strlen(line);
diff --git a/epan/emem.c b/epan/emem.c
index e188372964..a176066ea5 100644
--- a/epan/emem.c
+++ b/epan/emem.c
@@ -843,7 +843,7 @@ static void *
 emem_alloc(size_t size, emem_pool_t *mem)
 {
 	void *buf;
-	
+
 #if 0
 	/* For testing wmem, effectively redirects most emem memory to wmem.
 	 * You will also have to comment out several assertions in wmem_core.c,
@@ -2088,7 +2088,7 @@ emem_print_subtree(emem_tree_t* emem_tree, guint32 level)
 		printf("    ");
 	}
 
-	printf("EMEM tree:%p type:%s name:%s root:%p\n",emem_tree,(emem_tree->type==1)?"RedBlack":"unknown",emem_tree->name,(void *)(emem_tree->tree));
+	printf("EMEM tree:%p type:%s name:%s root:%p\n",(void *)emem_tree,(emem_tree->type==1)?"RedBlack":"unknown",emem_tree->name,(void *)(emem_tree->tree));
 	if(emem_tree->tree)
 		emem_tree_print_nodes("Root-", emem_tree->tree, level);
 }
diff --git a/epan/wmem/wmem_tree.c b/epan/wmem/wmem_tree.c
index 001fc5fe1d..07a2ba48df 100644
--- a/epan/wmem/wmem_tree.c
+++ b/epan/wmem/wmem_tree.c
@@ -678,8 +678,10 @@ wmem_tree_print_nodes(const char *prefix, wmem_tree_node_t *node, guint32 level)
         printf("    ");
     }
 
-    printf("%sNODE:%p parent:%p left:%p right:%p colour:%s key:%u %s:%p\n", prefix,
-            node, node->parent, node->left, node->right,
+    printf("%sNODE:%p parent:%p left:%p right:%p colour:%s key:%u %s:%p\n",
+            prefix,
+            (void *)node, (void *)node->parent,
+            (void *)node->left, (void *)node->right,
             node->color?"Black":"Red", node->key32,
             node->is_subtree?"tree":"data", node->data);
     if (node->left)
@@ -703,7 +705,7 @@ wmem_print_subtree(wmem_tree_t *tree, guint32 level)
         printf("    ");
     }
 
-    printf("WMEM tree:%p root:%p\n", tree, tree->root);
+    printf("WMEM tree:%p root:%p\n", (void *)tree, (void *)tree->root);
     if (tree->root) {
         wmem_tree_print_nodes("Root-", tree->root, level);
     }
diff --git a/ui/gtk/voip_calls.c b/ui/gtk/voip_calls.c
index dcd1de2cb2..500da4fe49 100644
--- a/ui/gtk/voip_calls.c
+++ b/ui/gtk/voip_calls.c
@@ -74,8 +74,8 @@
 #endif /* HAVE_LIBPORTAUDIO */
 
 
-#define DUMP_PTR1(p) printf("#=> %p\n",p)
-#define DUMP_PTR2(p) printf("==> %p\n",p)
+#define DUMP_PTR1(p) printf("#=> %p\n",(void *)p)
+#define DUMP_PTR2(p) printf("==> %p\n",(void *)p)
 
 const char *voip_call_state_name[8]={
 	"",
@@ -1530,7 +1530,7 @@ q931_calls_packet(void *ptr _U_, packet_info *pinfo, epan_dissect_t *edt _U_, co
 							g_free(tmp_listinfo->from_identity);
 							g_free(tmp_listinfo->to_identity);
 							DUMP_PTR2(tmp2_h323info->guid);
-                            g_free(tmp2_h323info->guid);
+							g_free(tmp2_h323info->guid);
 
 							list2 = g_list_first(tmp2_h323info->h245_list);
 							while (list2)
@@ -1749,7 +1749,7 @@ static void add_h245_Address(h323_calls_info_t *h323info,  h245_address_t *h245_
 static void free_h225_info(gpointer p) {
 	h323_calls_info_t *tmp_h323info = (h323_calls_info_t *)p;
 
-    DUMP_PTR2(tmp_h323info->guid);
+	DUMP_PTR2(tmp_h323info->guid);
 	g_free(tmp_h323info->guid);
 
 	if (tmp_h323info->h245_list) {
@@ -1848,7 +1848,7 @@ H225calls_packet(void *ptr _U_, packet_info *pinfo, epan_dissect_t *edt _U_, con
 		tmp_h323info = (h323_calls_info_t *)callsinfo->prot_info;
 		g_assert(tmp_h323info != NULL);
 		tmp_h323info->guid = (e_guid_t *)g_memdup(&pi->guid, sizeof pi->guid);
-        DUMP_PTR1(tmp_h323info->guid);
+		DUMP_PTR1(tmp_h323info->guid);
 
 		tmp_h323info->h225SetupAddr.type = AT_NONE;
 		tmp_h323info->h225SetupAddr.len = 0;