diff --git a/src/dcfg.c b/src/dcfg.c
index a157cf9..b38929c 100644
--- a/src/dcfg.c
+++ b/src/dcfg.c
@@ -61,12 +61,12 @@ typedef struct {
 #		define PTHREAD_MUTEX_RECURSIVE_NP 0
 #	endif
 
-static void pthread_mutex_init(pthread_mutex_t *m, void *data) { }
-static void pthread_mutex_destroy(pthread_mutex_t *m) { }
-static void pthread_mutex_lock(pthread_mutex_t *m) { }
-static void pthread_mutex_unlock(pthread_mutex_t *m) { }
+static void pthread_mutex_init(pthread_mutex_t *m, void *data) { (void)m; (void)data; }
+static void pthread_mutex_destroy(pthread_mutex_t *m) { (void)m; }
+static void pthread_mutex_lock(pthread_mutex_t *m) { (void)m; }
+static void pthread_mutex_unlock(pthread_mutex_t *m) { (void)m; }
 void pthread_mutexattr_init(pthread_mutexattr_t *attr);
-static void pthread_mutexattr_settype(pthread_mutexattr_t *attr, int type) { }
+static void pthread_mutexattr_settype(pthread_mutexattr_t *attr, int type) { (void)attr; (void)type; }
 #endif
 
 #include <assert.h>