diff --git a/build/libifm.php b/build/libifm.php
index faebeb8..7f87480 100644
--- a/build/libifm.php
+++ b/build/libifm.php
@@ -2909,7 +2909,7 @@ function IFM( params ) {
 					return false;
 		}
 		// custom limitations
-		foreach( $this->config->forbiddenChars as $char )
+		foreach( $this->config['forbiddenChars'] as $char )
 			if( strpos( $f, $char ) !== false )
 				return false;
 		return true;
diff --git a/ifm.php b/ifm.php
index 30e416d..48ba454 100644
--- a/ifm.php
+++ b/ifm.php
@@ -2909,7 +2909,7 @@ function IFM( params ) {
 					return false;
 		}
 		// custom limitations
-		foreach( $this->config->forbiddenChars as $char )
+		foreach( $this->config['forbiddenChars'] as $char )
 			if( strpos( $f, $char ) !== false )
 				return false;
 		return true;
diff --git a/src/main.php b/src/main.php
index e0ed9bb..729444e 100644
--- a/src/main.php
+++ b/src/main.php
@@ -993,7 +993,7 @@ f00bar;
 					return false;
 		}
 		// custom limitations
-		foreach( $this->config->forbiddenChars as $char )
+		foreach( $this->config['forbiddenChars'] as $char )
 			if( strpos( $f, $char ) !== false )
 				return false;
 		return true;