diff --git a/sys/arm/arm/busdma_machdep-v4.c b/sys/arm/arm/busdma_machdep-v4.c
index 6c1fd6a9e99..68088799de7 100644
--- a/sys/arm/arm/busdma_machdep-v4.c
+++ b/sys/arm/arm/busdma_machdep-v4.c
@@ -669,6 +669,7 @@ allocate_map(bus_dma_tag_t dmat, int mflags)
 		return (NULL);
 	}
 	map->segments = (bus_dma_segment_t *)((uintptr_t)map + mapsize);
+	STAILQ_INIT(&map->bpages);
 	return (map);
 }
 
diff --git a/sys/arm/arm/busdma_machdep-v6.c b/sys/arm/arm/busdma_machdep-v6.c
index 6e2fb4a0d8f..a2b8b77f666 100644
--- a/sys/arm/arm/busdma_machdep-v6.c
+++ b/sys/arm/arm/busdma_machdep-v6.c
@@ -735,6 +735,7 @@ allocate_map(bus_dma_tag_t dmat, int mflags)
 		return (NULL);
 	}
 	map->segments = (bus_dma_segment_t *)((uintptr_t)map + mapsize);
+	STAILQ_INIT(&map->bpages);
 	return (map);
 }