diff --git a/udevd.c b/udevd.c
index fe01d8d4b9..05df871a34 100644
--- a/udevd.c
+++ b/udevd.c
@@ -335,6 +335,7 @@ static int mem_size_mb(void)
 		}
 	}
 
+	fclose(f);
 	return memsize;
 }