diff --git a/src/libaktualizr-posix/asn1/asn1_test.cc b/src/libaktualizr-posix/asn1/asn1_test.cc
index 3ed82bba6..f56349139 100644
--- a/src/libaktualizr-posix/asn1/asn1_test.cc
+++ b/src/libaktualizr-posix/asn1/asn1_test.cc
@@ -4,6 +4,7 @@
 
 #include <gtest/gtest.h>
 
+#include <iomanip>
 #include <iostream>
 #include <string>