diff --git a/libretroshare/src/pqi/p3authmgr.h b/libretroshare/src/pqi/p3authmgr.h
index ce0c24d71..bb9e53124 100644
--- a/libretroshare/src/pqi/p3authmgr.h
+++ b/libretroshare/src/pqi/p3authmgr.h
@@ -30,6 +30,7 @@
 #include <map>
 #include <string>
 #include <gpgme.h>
+#include <stdint.h>
 
 /************** GENERIC AUTHENTICATION MANAGER ***********
  * Provides a common interface for certificates.