diff --git a/sys/conf/NOTES b/sys/conf/NOTES
index 44b3639a143a..35eb7ca3b519 100644
--- a/sys/conf/NOTES
+++ b/sys/conf/NOTES
@@ -807,6 +807,7 @@ options 	NULLFS			#NULL filesystem
 options 	PORTALFS		#Portal filesystem
 options 	PROCFS			#Process filesystem (requires PSEUDOFS)
 options 	PSEUDOFS		#Pseudo-filesystem framework
+options 	PSEUDOFS_TRACE		#Debugging support for PSEUDOFS
 options 	SMBFS			#SMB/CIFS filesystem
 options 	UDF			#Universal Disk Format
 # Broken (seriously (functionally) broken):
diff --git a/sys/conf/options b/sys/conf/options
index 85788b8969a7..25608bcf5f92 100644
--- a/sys/conf/options
+++ b/sys/conf/options
@@ -181,6 +181,9 @@ UDF		opt_dontuse.h
 UMAPFS		opt_dontuse.h
 UNIONFS		opt_dontuse.h
 
+# Pseudofs debugging
+PSEUDOFS_TRACE	opt_pseudofs.h
+
 # Broken - ffs_snapshot() dependency from ufs_lookup() :-(
 FFS		opt_ffs_broken_fixme.h
 
diff --git a/sys/modules/pseudofs/Makefile b/sys/modules/pseudofs/Makefile
index e84a6391ae0a..b04bffb0beaf 100644
--- a/sys/modules/pseudofs/Makefile
+++ b/sys/modules/pseudofs/Makefile
@@ -4,6 +4,7 @@
 
 KMOD=	pseudofs
 SRCS=	opt_mac.h \
+	opt_pseudofs.h \
 	vnode_if.h \
 	pseudofs.c \
 	pseudofs_fileno.c \