diff --git a/port/stack_trace.cc b/port/stack_trace.cc
index 296b1f620..7797b61d9 100644
--- a/port/stack_trace.cc
+++ b/port/stack_trace.cc
@@ -20,7 +20,9 @@ void PrintStack(int first_frames_to_skip) {}
 #include <execinfo.h>
 #include <signal.h>
 #include <stdio.h>
-#include <stdlib.h>
+// It's odd that including this breaks in GCC 7 but the build doesn't break
+// if I remove it even under GCC 4.8.
+// #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 #include <cxxabi.h>