diff --git a/share/man/man9/bus_dma.9 b/share/man/man9/bus_dma.9
index 7886b14876f..3b5ca78e46a 100644
--- a/share/man/man9/bus_dma.9
+++ b/share/man/man9/bus_dma.9
@@ -82,7 +82,7 @@
 .In machine/bus.h
 .Ft int
 .Fn bus_dma_tag_create "bus_dma_tag_t parent" "bus_size_t alignment" \
-"bus_size_t boundary" "bus_addr_t lowaddr" "bus_addr_t highaddr" \
+"bus_addr_t boundary" "bus_addr_t lowaddr" "bus_addr_t highaddr" \
 "bus_dma_filter_t *filtfunc" "void *filtfuncarg" "bus_size_t maxsize" \
 "int nsegments" "bus_size_t maxsegsz" "int flags" "bus_dma_lock_t *lockfunc" \
 "void *lockfuncarg" "bus_dma_tag_t *dmat"
diff --git a/share/man/man9/contigmalloc.9 b/share/man/man9/contigmalloc.9
index f0797be6127..ba1f4286048 100644
--- a/share/man/man9/contigmalloc.9
+++ b/share/man/man9/contigmalloc.9
@@ -42,7 +42,7 @@
 .Fa "vm_paddr_t low"
 .Fa "vm_paddr_t high"
 .Fa "unsigned long alignment"
-.Fa "unsigned long boundary"
+.Fa "vm_paddr_t boundary"
 .Fc
 .Ft void
 .Fo contigfree