diff --git a/mythplugins/mythzoneminder/mythzmserver/zmserver.cpp b/mythplugins/mythzoneminder/mythzmserver/zmserver.cpp
index 6ddda9bfaaf..ea1aa17e92a 100644
--- a/mythplugins/mythzoneminder/mythzmserver/zmserver.cpp
+++ b/mythplugins/mythzoneminder/mythzmserver/zmserver.cpp
@@ -24,10 +24,7 @@
 #include <netinet/in.h>
 #include <sys/stat.h>
 #include <sys/shm.h>
-
-#if _POSIX_MAPPED_FILES > 0L
 #include <sys/mman.h>
-#endif
 
 #ifdef linux
 #  include <sys/vfs.h>
diff --git a/mythtv/libs/libmyth/rssparse.h b/mythtv/libs/libmyth/rssparse.h
index 7408ac45b1f..dfe14275f83 100644
--- a/mythtv/libs/libmyth/rssparse.h
+++ b/mythtv/libs/libmyth/rssparse.h
@@ -13,6 +13,7 @@ using namespace std;
 #include <QPair>
 #include <QMap>
 #include <QVariant>
+#include <sys/types.h>
 
 #include "mythexp.h"
 
diff --git a/mythtv/libs/libmythbase/compat.h b/mythtv/libs/libmythbase/compat.h
index ff2890f29ed..425624ac0d5 100644
--- a/mythtv/libs/libmythbase/compat.h
+++ b/mythtv/libs/libmythbase/compat.h
@@ -44,6 +44,8 @@
 # include <sys/resource.h> // for setpriority
 # include <sys/socket.h>
 # include <sys/wait.h>     // For WIFEXITED on Mac OS X
+# include <stdio.h>        // for snprintf(), used by inline dlerror()
+# include <unistd.h>       // for usleep()
 #endif
 
 #ifdef USING_MINGW
diff --git a/mythtv/libs/libmythtv/audioinput.h b/mythtv/libs/libmythtv/audioinput.h
index 67f05d1b4bd..915534976d1 100644
--- a/mythtv/libs/libmythtv/audioinput.h
+++ b/mythtv/libs/libmythtv/audioinput.h
@@ -22,6 +22,7 @@
 #define _AUDIOINPUT_H_
 
 #include <QString>
+#include <unistd.h>
 
 class AudioInput
 {