diff --git a/pgrep.c b/pgrep.c
index 205a1db6..4fe5e8a0 100644
--- a/pgrep.c
+++ b/pgrep.c
@@ -716,6 +716,11 @@ static struct el * select_procs (int *num)
         free(cmdsearch);
         free(cmdoutput);
 
+	if (preg) {
+		regfree(preg);
+		free(preg);
+	}
+
 	return list;
 }