diff --git a/libs/audio/targets/snd_alsa_0_5.c b/libs/audio/targets/snd_alsa_0_5.c
index b1aa15f08..f954d3e7b 100644
--- a/libs/audio/targets/snd_alsa_0_5.c
+++ b/libs/audio/targets/snd_alsa_0_5.c
@@ -40,6 +40,12 @@ static const char rcsid[] =
 #ifdef HAVE_SYS_MMAN_H
 # include <sys/mman.h>
 #endif
+#ifdef HAVE_STRING_H
+# include <string.h>
+#endif
+#ifdef HAVE_STRINGS_H
+# include <strings.h>
+#endif
 #ifdef HAVE_SYS_SOUNDCARD_H
 # include <sys/soundcard.h>
 #elif defined HAVE_LINUX_SOUNDCARD_H