diff --git a/stepmania/src/archutils/Unix/Backtrace.cpp b/stepmania/src/archutils/Unix/Backtrace.cpp
index 5ad79139b8..f98dc83fd6 100644
--- a/stepmania/src/archutils/Unix/Backtrace.cpp
+++ b/stepmania/src/archutils/Unix/Backtrace.cpp
@@ -6,7 +6,6 @@
 #include <cstdlib>
 #include <sys/types.h>
 #include <sys/wait.h>
-#include <sys/ptrace.h>
 #include <sys/stat.h>
 #include <cerrno>
 #include <fcntl.h>