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-rw-r--r--modules/field/field.api.php3
1 files changed, 3 insertions, 0 deletions
diff --git a/modules/field/field.api.php b/modules/field/field.api.php
index a3d8bdbf4..9b2d3bb4f 100644
--- a/modules/field/field.api.php
+++ b/modules/field/field.api.php
@@ -211,6 +211,9 @@ function hook_field_info_alter(&$info) {
/**
* Define the Field API schema for a field structure.
*
+ * This hook MUST be defined in .install for it to be detected during
+ * installation and upgrade.
+ *
* @param $field
* A field structure.
*