diff --git a/src/modules/module-alsa-sink.c b/src/modules/module-alsa-sink.c
index d49b34076..9238072b5 100644
--- a/src/modules/module-alsa-sink.c
+++ b/src/modules/module-alsa-sink.c
@@ -342,7 +342,7 @@ int pa__init(pa_core *c, pa_module*m) {
     }
     period_size = fragsize/frame_size;
     
-    u = pa_xmalloc0(sizeof(struct userdata));
+    u = pa_xnew0(struct userdata, 1);
     m->userdata = u;
     u->module = m;
     
diff --git a/src/modules/module-alsa-source.c b/src/modules/module-alsa-source.c
index c4e8689ce..68c61be97 100644
--- a/src/modules/module-alsa-source.c
+++ b/src/modules/module-alsa-source.c
@@ -335,7 +335,7 @@ int pa__init(pa_core *c, pa_module*m) {
     }
     period_size = fragsize/frame_size;
     
-    u = pa_xnew(struct userdata, 1);
+    u = pa_xnew0(struct userdata, 1);
     m->userdata = u;
     u->module = m;