diff --git a/includes/classes/Feature/Comments/Comments.php b/includes/classes/Feature/Comments/Comments.php
index 470bec373e..8f6e388744 100644
--- a/includes/classes/Feature/Comments/Comments.php
+++ b/includes/classes/Feature/Comments/Comments.php
@@ -110,7 +110,7 @@ public function integrate_search_queries( $enabled, $query ) {
 			return $enabled;
 		}
 
-		if ( isset( $query->query_vars['ep_integrate'] ) && ! filter_var( $query->query_vars['ep_integrate'], FILTER_VALIDATE_BOOL ) ) {
+		if ( isset( $query->query_vars['ep_integrate'] ) && ! filter_var( $query->query_vars['ep_integrate'], FILTER_VALIDATE_BOOLEAN ) ) {
 			$enabled = false;
 		} elseif ( ! empty( $query->query_vars['search'] ) ) {
 			$enabled = true;
diff --git a/includes/classes/Feature/Search/Search.php b/includes/classes/Feature/Search/Search.php
index 2ad26d6233..203445df00 100644
--- a/includes/classes/Feature/Search/Search.php
+++ b/includes/classes/Feature/Search/Search.php
@@ -576,7 +576,7 @@ public function integrate_search_queries( $enabled, $query ) {
 			return $enabled;
 		}
 
-		if ( isset( $query->query_vars['ep_integrate'] ) && ! filter_var( $query->query_vars['ep_integrate'], FILTER_VALIDATE_BOOL ) ) {
+		if ( isset( $query->query_vars['ep_integrate'] ) && ! filter_var( $query->query_vars['ep_integrate'], FILTER_VALIDATE_BOOLEAN ) ) {
 			return false;
 		}
 
diff --git a/includes/classes/Feature/Terms/Terms.php b/includes/classes/Feature/Terms/Terms.php
index d9dbc05031..d61649a33c 100644
--- a/includes/classes/Feature/Terms/Terms.php
+++ b/includes/classes/Feature/Terms/Terms.php
@@ -87,7 +87,7 @@ public function integrate_search_queries( $enabled, $query ) {
 			return $enabled;
 		}
 
-		if ( isset( $query->query_vars['ep_integrate'] ) && ! filter_var( $query->query_vars['ep_integrate'], FILTER_VALIDATE_BOOL ) ) {
+		if ( isset( $query->query_vars['ep_integrate'] ) && ! filter_var( $query->query_vars['ep_integrate'], FILTER_VALIDATE_BOOLEAN ) ) {
 			$enabled = false;
 		} elseif ( ! empty( $query->query_vars['search'] ) ) {
 			$enabled = true;
diff --git a/includes/classes/Feature/Users/Users.php b/includes/classes/Feature/Users/Users.php
index 1defe0ab9e..d5ea756e25 100644
--- a/includes/classes/Feature/Users/Users.php
+++ b/includes/classes/Feature/Users/Users.php
@@ -87,7 +87,7 @@ public function integrate_search_queries( $enabled, $query ) {
 			return $enabled;
 		}
 
-		if ( isset( $query->query_vars['ep_integrate'] ) && ! filter_var( $query->query_vars['ep_integrate'], FILTER_VALIDATE_BOOL ) ) {
+		if ( isset( $query->query_vars['ep_integrate'] ) && ! filter_var( $query->query_vars['ep_integrate'], FILTER_VALIDATE_BOOLEAN ) ) {
 			$enabled = false;
 		} elseif ( ! empty( $query->query_vars['search'] ) ) {
 			$enabled = true;
diff --git a/includes/classes/Feature/WooCommerce/WooCommerce.php b/includes/classes/Feature/WooCommerce/WooCommerce.php
index d88281d9ec..1e891dcf9d 100644
--- a/includes/classes/Feature/WooCommerce/WooCommerce.php
+++ b/includes/classes/Feature/WooCommerce/WooCommerce.php
@@ -947,7 +947,7 @@ protected function should_integrate_with_query( $query ) {
 		 * @return  {bool} New skip value
 		 */
 		if ( apply_filters( 'ep_skip_query_integration', false, $query ) ||
-			( isset( $query->query_vars['ep_integrate'] ) && ! filter_var( $query->query_vars['ep_integrate'], FILTER_VALIDATE_BOOL ) ) ) {
+			( isset( $query->query_vars['ep_integrate'] ) && ! filter_var( $query->query_vars['ep_integrate'], FILTER_VALIDATE_BOOLEAN ) ) ) {
 			return false;
 		}
 
diff --git a/includes/classes/Indexable.php b/includes/classes/Indexable.php
index 27ab62dd91..54e002543d 100644
--- a/includes/classes/Indexable.php
+++ b/includes/classes/Indexable.php
@@ -385,7 +385,7 @@ public function elasticpress_enabled( $query ) {
 		 */
 		$enabled = apply_filters( 'ep_elasticpress_enabled', $enabled, $query );
 
-		if ( isset( $query->query_vars['ep_integrate'] ) && ! filter_var( $query->query_vars['ep_integrate'], FILTER_VALIDATE_BOOL ) ) {
+		if ( isset( $query->query_vars['ep_integrate'] ) && ! filter_var( $query->query_vars['ep_integrate'], FILTER_VALIDATE_BOOLEAN ) ) {
 			$enabled = false;
 		}