diff --git a/xrdp.spec b/xrdp.spec
index edb3f71..1c55397 100644
--- a/xrdp.spec
+++ b/xrdp.spec
@@ -26,6 +26,7 @@ BuildRequires: pkgconfig(fuse)
 BuildRequires: pkgconfig(openssl)
 BuildRequires: pkgconfig(pixman-1)
 BuildRequires: pkgconfig(systemd)
+BuildRequires: nasm
 
 # tigervnc-server-minimal provides Xvnc (default for now)
 Requires: tigervnc-server-minimal