diff --git a/cddl/lib/Makefile b/cddl/lib/Makefile
index 17ef47449269..52e97d74be99 100644
--- a/cddl/lib/Makefile
+++ b/cddl/lib/Makefile
@@ -19,7 +19,7 @@ _libzpool=	libzpool
 .endif
 .endif
 
-.if ${MACHINE_ARCH} == amd64 || ${MACHINE_ARCH} == i386
+.if ${MACHINE_ARCH} == "amd64" || ${MACHINE_ARCH} == "i386"
 _drti=		drti
 _libdtrace=	libdtrace
 .endif