diff --git a/system/libraries/Image_lib.php b/system/libraries/Image_lib.php
index 3957420..85435f6 100644
--- a/system/libraries/Image_lib.php
+++ b/system/libraries/Image_lib.php
@@ -484,7 +484,7 @@
 					return FALSE;
 				}
 			
-				@chmod($this->full_dst_path, 0777);
+				@chmod($this->full_dst_path, DIR_WRITE_MODE);
 				return TRUE;
 			}
 			
@@ -539,7 +539,7 @@
 		imagedestroy($src_img);
 		
 		// Set the file to 777
-		@chmod($this->full_dst_path, 0777);
+		@chmod($this->full_dst_path, DIR_WRITE_MODE);
 		
 		return TRUE;
 	}
@@ -609,7 +609,7 @@
 		}
 		
 		// Set the file to 777
-		@chmod($this->full_dst_path, 0777);
+		@chmod($this->full_dst_path, DIR_WRITE_MODE);
 		
 		return TRUE;
 	}
@@ -695,7 +695,7 @@
 		// we have to rename the temp file.
 		copy ($this->dest_folder.'netpbm.tmp', $this->full_dst_path);
 		unlink ($this->dest_folder.'netpbm.tmp');
-		@chmod($dst_image, 0777);
+		@chmod($dst_image, DIR_WRITE_MODE);
 		
 		return TRUE;
 	}
@@ -754,7 +754,7 @@
 		
 		// Set the file to 777
 		
-		@chmod($this->full_dst_path, 0777);
+		@chmod($this->full_dst_path, DIR_WRITE_MODE);
 		
 		return true;
 	}
@@ -838,7 +838,7 @@
 		imagedestroy($src_img);
 		
 		// Set the file to 777
-		@chmod($this->full_dst_path, 0777);
+		@chmod($this->full_dst_path, DIR_WRITE_MODE);
 		
 		return TRUE;
 	}
diff --git a/system/libraries/Log.php b/system/libraries/Log.php
index f9ca85a..1aa8bd0 100644
--- a/system/libraries/Log.php
+++ b/system/libraries/Log.php
@@ -109,7 +109,7 @@
 		flock($fp, LOCK_UN);
 		fclose($fp);
 	
-		@chmod($filepath, 0666); 		
+		@chmod($filepath, FILE_WRITE_MODE); 		
 		return TRUE;
 	}
 
diff --git a/system/libraries/Output.php b/system/libraries/Output.php
index a4d8d34..07990eb 100644
--- a/system/libraries/Output.php
+++ b/system/libraries/Output.php
@@ -308,7 +308,7 @@
 		fwrite($fp, $expire.'TS--->'.$output);
 		flock($fp, LOCK_UN);
 		fclose($fp);
-		@chmod($cache_path, 0777);
+		@chmod($cache_path, DIR_WRITE_MODE);
 
 		log_message('debug', "Cache file written: ".$cache_path);
 	}