diff --git a/engine/include/fishbone/machdep.h b/engine/include/fishbone/machdep.h
index 90879c8..8e7b4ac 100644
--- a/engine/include/fishbone/machdep.h
+++ b/engine/include/fishbone/machdep.h
@@ -6,6 +6,7 @@
 #include <fstream>
 
 #include <cstdio>
+#include <cstring>
 #include <cmath>
 
 #include <fishbone/config.h>
diff --git a/engine/src/soundldr/flac.cc b/engine/src/soundldr/flac.cc
index 42a35c5..f812160 100644
--- a/engine/src/soundldr/flac.cc
+++ b/engine/src/soundldr/flac.cc
@@ -1,4 +1,3 @@
-#include <cstring>
 #include <fishbone/foundation.h>
 
 struct fishbone::Sound::Impl {
diff --git a/engine/src/soundldr/mp3.cc b/engine/src/soundldr/mp3.cc
index c6fc083..057330f 100644
--- a/engine/src/soundldr/mp3.cc
+++ b/engine/src/soundldr/mp3.cc
@@ -1,4 +1,3 @@
-#include <cstring>
 #include <fishbone/foundation.h>
 
 struct fishbone::Sound::Impl {
diff --git a/engine/src/soundldr/vorbis.cc b/engine/src/soundldr/vorbis.cc
index 574ebc6..56d3047 100644
--- a/engine/src/soundldr/vorbis.cc
+++ b/engine/src/soundldr/vorbis.cc
@@ -1,4 +1,3 @@
-#include <cstring>
 #include <fishbone/foundation.h>
 
 struct fishbone::Sound::Impl {
diff --git a/engine/src/soundldr/wav.cc b/engine/src/soundldr/wav.cc
index 62b9abc..5703b68 100644
--- a/engine/src/soundldr/wav.cc
+++ b/engine/src/soundldr/wav.cc
@@ -1,4 +1,3 @@
-#include <cstring>
 #include <fishbone/foundation.h>
 
 struct fishbone::Sound::Impl {
diff --git a/engine/src/soundldr/xmp.cc b/engine/src/soundldr/xmp.cc
index 7b4e845..f2f0a77 100644
--- a/engine/src/soundldr/xmp.cc
+++ b/engine/src/soundldr/xmp.cc
@@ -1,4 +1,3 @@
-#include <cstring>
 #include <fishbone/foundation.h>
 
 struct fishbone::Sound::Impl {