diff --git a/src/cli.cc b/src/cli.cc
index 40bc10b..072f6ec 100644
--- a/src/cli.cc
+++ b/src/cli.cc
@@ -15,6 +15,7 @@
 #include <string.h>
 #include <sys/stat.h>
 #include <unistd.h>
+#include <algorithm>
 
 static const char help_message[] =
 PROJECT_NAME " version " PROJECT_VERSION
diff --git a/src/opus.cc b/src/opus.cc
index 85dbe53..e23e512 100644
--- a/src/opus.cc
+++ b/src/opus.cc
@@ -24,6 +24,7 @@
 #include <opustags.h>
 
 #include <string.h>
+#include <algorithm>
 
 ot::opus_tags ot::parse_tags(const ogg_packet& packet)
 {