diff --git a/wp-admin/includes/class-wp-filesystem-ftpext.php b/wp-admin/includes/class-wp-filesystem-ftpext.php
index b48a125162..12d56aa33b 100644
--- a/wp-admin/includes/class-wp-filesystem-ftpext.php
+++ b/wp-admin/includes/class-wp-filesystem-ftpext.php
@@ -152,6 +152,8 @@ class WP_Filesystem_FTPext{
 			$type = isset($this->filetypes[ $extension ]) ? $this->filetypes[ $extension ] : FTP_ASCII;
 		}
 		$temp = tmpfile();
+		if ( ! $temp )
+			return false;
 		if( ! @ftp_fget($this->link,$temp,$file,$type,$resumepos) )
 			return false;
 		fseek($temp, 0); //Skip back to the start of the file being written to
@@ -171,6 +173,8 @@ class WP_Filesystem_FTPext{
 			$type = isset($this->filetypes[ $extension ]) ? $this->filetypes[ $extension ] : FTP_ASCII;
 		}
 		$temp = tmpfile();
+		if ( ! $temp )
+			return false;
 		fwrite($temp,$contents);
 		fseek($temp, 0); //Skip back to the start of the file being written to
 		$ret = @ftp_fput($this->link,$file,$temp,$type);
diff --git a/wp-admin/includes/class-wp-filesystem-ftpsockets.php b/wp-admin/includes/class-wp-filesystem-ftpsockets.php
index fbac7b7e41..11d4e83c22 100644
--- a/wp-admin/includes/class-wp-filesystem-ftpsockets.php
+++ b/wp-admin/includes/class-wp-filesystem-ftpsockets.php
@@ -159,6 +159,8 @@ class WP_Filesystem_ftpsockets{
 		}
 		$this->ftp->SetType($type);
 		$temp = tmpfile();
+		if ( ! $temp )
+			return false;
 		if ( ! $this->ftp->fget($temp, $file) ) {
 			fclose($temp);
 			return ''; //Blank document, File does exist, Its just blank.
@@ -183,6 +185,8 @@ class WP_Filesystem_ftpsockets{
 		$this->ftp->SetType($type);
 
 		$temp = tmpfile();
+		if ( ! $temp )
+			return false;
 		fwrite($temp,$contents);
 		fseek($temp, 0); //Skip back to the start of the file being written to
 		$ret = $this->ftp->fput($file, $temp);