diff --git a/.gitignore b/.gitignore
index 76500c6..01a1447 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,6 +7,7 @@ mkp224o
 
 # garbage
 configure
+configure~
 GNUmakefile
 GNUmakefile.in.bak
 config.status
diff --git a/worker_batch.inc.h b/worker_batch.inc.h
index 8de5330..508f7ab 100644
--- a/worker_batch.inc.h
+++ b/worker_batch.inc.h
@@ -21,6 +21,8 @@ void *worker_batch(void *task)
 
 #ifdef STATISTICS
 	struct statstruct *st = (struct statstruct *)task;
+#else
+	(void) task;
 #endif
 
 	PREFILTER
diff --git a/worker_batch_pass.inc.h b/worker_batch_pass.inc.h
index 3676eec..74320a4 100644
--- a/worker_batch_pass.inc.h
+++ b/worker_batch_pass.inc.h
@@ -22,6 +22,8 @@ void *worker_batch_pass(void *task)
 
 #ifdef STATISTICS
 	struct statstruct *st = (struct statstruct *)task;
+#else
+	(void) task;
 #endif
 
 	PREFILTER
diff --git a/worker_slow.inc.h b/worker_slow.inc.h
index 799e4aa..2df8930 100644
--- a/worker_slow.inc.h
+++ b/worker_slow.inc.h
@@ -17,6 +17,7 @@ void *worker_slow(void *task)
 #else
 	(void) task;
 #endif
+
 	PREFILTER
 
 	memcpy(secret,skprefix,SKPREFIX_SIZE);