diff --git a/inc/single-helpers.php b/inc/single-helpers.php
index 33e6dba..821d0b4 100644
--- a/inc/single-helpers.php
+++ b/inc/single-helpers.php
@@ -12,6 +12,25 @@ function thalim_format_date($raw, $lang = 'fr', $format = 'j F Y') {
     return date_i18n($format, $ts);
 }
 
+/**
+ * Tell whether an image is displayed in portrait, taking EXIF orientation
+ * into account. WordPress stores the raw (un-rotated) width/height, but the
+ * browser auto-rotates JPEGs that carry an EXIF orientation flag of 5–8
+ * (90°/270° rotation), which swaps the displayed dimensions. Without this,
+ * a phone photo shot in portrait can be mis-classified as landscape.
+ */
+function thalim_image_is_portrait($doc_id, $w, $h) {
+    $path = get_attached_file($doc_id);
+    if ($path && function_exists('exif_read_data') && preg_match('/\.jpe?g$/i', $path)) {
+        $exif = @exif_read_data($path);
+        $orientation = isset($exif['Orientation']) ? (int) $exif['Orientation'] : 0;
+        if (in_array($orientation, [5, 6, 7, 8], true)) {
+            [$w, $h] = [$h, $w];
+        }
+    }
+    return $h > $w;
+}
+
 /**
  * Resolve all Pods custom fields for a single post into a display-ready array.
  */
@@ -158,7 +177,7 @@ function thalim_get_single_data($post_id) {
                     'alt'      => get_post_meta($doc_id, '_wp_attachment_image_alt', true) ?: '',
                     'caption'  => thalim_bilingual(wp_get_attachment_caption($doc_id) ?: '', $lang),
                     'title'    => thalim_bilingual(get_the_title($doc_id) ?: '', $lang),
-                    'portrait' => ($h > $w),
+                    'portrait' => thalim_image_is_portrait($doc_id, $w, $h),
                 ];
             }
         } else {