diff --git a/src/core/core-eval.c b/src/core/core-eval.c
index fcddfc9f3..b0ed65e92 100644
--- a/src/core/core-eval.c
+++ b/src/core/core-eval.c
@@ -1153,6 +1153,7 @@ char *
 eval_hdata_count (const char *text, struct t_eval_context *eval_context)
 {
     struct t_hdata *hdata;
+    unsigned long ptr_value;
     void *pointer;
     char *pos1, *pos2, *value, *hdata_name, *pointer_name, str_count[64];
     int rc, count;
@@ -1183,9 +1184,10 @@ eval_hdata_count (const char *text, struct t_eval_context *eval_context)
 
     if (strncmp (pointer_name, "0x", 2) == 0)
     {
-        rc = sscanf (pointer_name, "%p", &pointer);
+        rc = sscanf (pointer_name, "%lx", &ptr_value);
         if ((rc != EOF) && (rc != 0))
         {
+            pointer = (void *)ptr_value;
             if (!hdata_check_pointer (hdata, NULL, pointer))
                 goto end;
         }
diff --git a/src/plugins/relay/relay.c b/src/plugins/relay/relay.c
index d34d185ae..126df3280 100644
--- a/src/plugins/relay/relay.c
+++ b/src/plugins/relay/relay.c
@@ -268,6 +268,7 @@ relay_modifier_input_text_display_cb (const void *pointer,
 {
     struct t_gui_buffer *ptr_buffer;
     struct t_relay_remote *ptr_remote;
+    unsigned long value;
     const char *ptr_input, *ptr_text_local, *ptr_text_remote;
     char *text, *new_input;
     int rc, input_get_any_user_data;
@@ -283,10 +284,12 @@ relay_modifier_input_text_display_cb (const void *pointer,
     if (!relay_remotes)
         return NULL;
 
-    rc = sscanf (modifier_data, "%p", &ptr_buffer);
+    rc = sscanf (modifier_data, "%lx", &value);
     if ((rc == EOF) || (rc == 0))
         return NULL;
 
+    ptr_buffer = (struct t_gui_buffer *)value;
+
     if (weechat_buffer_get_pointer (ptr_buffer, "plugin") != weechat_plugin)
         return NULL;
 
diff --git a/src/plugins/trigger/trigger-callback.c b/src/plugins/trigger/trigger-callback.c
index f928c1610..0c8318c6c 100644
--- a/src/plugins/trigger/trigger-callback.c
+++ b/src/plugins/trigger/trigger-callback.c
@@ -813,9 +813,9 @@ trigger_callback_modifier_cb (const void *pointer, void *data,
     const char *ptr_string;
     char *string_modified, *pos, *buffer_pointer;
     char *str_tags, **tags, *prefix, *string_no_color;
+    unsigned long value;
     int num_tags, rc;
     void *ptr_irc_server, *ptr_irc_channel;
-    struct t_gui_buffer *ptr_buffer;
 
     TRIGGER_CALLBACK_CB_INIT(NULL);
 
@@ -928,10 +928,10 @@ trigger_callback_modifier_cb (const void *pointer, void *data,
                                               pos - modifier_data);
             if (buffer_pointer)
             {
-                rc = sscanf (buffer_pointer, "%p", &ptr_buffer);
+                rc = sscanf (buffer_pointer, "%lx", &value);
                 if ((rc != EOF) && (rc != 0))
                 {
-                    ctx.buffer = ptr_buffer;
+                    ctx.buffer = (struct t_gui_buffer *)value;
                     weechat_hashtable_set (
                         ctx.extra_vars,
                         "tg_plugin",
diff --git a/tests/unit/core/hook/test-hook-modifier.cpp b/tests/unit/core/hook/test-hook-modifier.cpp
index 24c919222..c9fea36e9 100644
--- a/tests/unit/core/hook/test-hook-modifier.cpp
+++ b/tests/unit/core/hook/test-hook-modifier.cpp
@@ -63,6 +63,7 @@ test_modifier_cb (const void *pointer, void *data,
     char **items, *new_string;
     const char *ptr_plugin, *ptr_tags, *ptr_msg;
     int num_items, length, rc;
+    unsigned long value;
     struct t_gui_buffer *ptr_buffer;
 
     /* make C++ compiler happy */
@@ -83,10 +84,12 @@ test_modifier_cb (const void *pointer, void *data,
 
     ptr_tags = (num_items >= 2) ? items[1] : NULL;
 
-    rc = sscanf (items[0], "%p", &ptr_buffer);
+    rc = sscanf (items[0], "%lx", &value);
     if ((rc == EOF) || (rc == 0))
         goto error;
 
+    ptr_buffer = (struct t_gui_buffer *)value;
+
     ptr_plugin = gui_buffer_get_plugin_name (ptr_buffer);
     if (!ptr_plugin)
         goto error;