diff --git a/src/engines/ptrace.cc b/src/engines/ptrace.cc
index 59b615f..e02cddf 100644
--- a/src/engines/ptrace.cc
+++ b/src/engines/ptrace.cc
@@ -21,6 +21,7 @@
 
 #if defined(__aarch64__)
 #  include <sys/uio.h>
+#  include <elf.h>
 #endif
 
 #include <map>