diff --git a/lib/nghttp2_pq.c b/lib/nghttp2_pq.c
index bebccc76..64353acc 100644
--- a/lib/nghttp2_pq.c
+++ b/lib/nghttp2_pq.c
@@ -29,13 +29,12 @@
 
 #include "nghttp2_helper.h"
 
-int nghttp2_pq_init(nghttp2_pq *pq, nghttp2_less less, nghttp2_mem *mem) {
+void nghttp2_pq_init(nghttp2_pq *pq, nghttp2_less less, nghttp2_mem *mem) {
   pq->mem = mem;
   pq->capacity = 0;
   pq->q = NULL;
   pq->length = 0;
   pq->less = less;
-  return 0;
 }
 
 void nghttp2_pq_free(nghttp2_pq *pq) {
diff --git a/lib/nghttp2_pq.h b/lib/nghttp2_pq.h
index 7b7b7392..c8d90ef2 100644
--- a/lib/nghttp2_pq.h
+++ b/lib/nghttp2_pq.h
@@ -55,14 +55,8 @@ typedef struct {
 
 /*
  * Initializes priority queue |pq| with compare function |cmp|.
- *
- * This function returns 0 if it succeeds, or one of the following
- * negative error codes:
- *
- * NGHTTP2_ERR_NOMEM
- *     Out of memory.
  */
-int nghttp2_pq_init(nghttp2_pq *pq, nghttp2_less less, nghttp2_mem *mem);
+void nghttp2_pq_init(nghttp2_pq *pq, nghttp2_less less, nghttp2_mem *mem);
 
 /*
  * Deallocates any resources allocated for |pq|.  The stored items are
diff --git a/lib/nghttp2_session.c b/lib/nghttp2_session.c
index c7ddbfa1..e6725165 100644
--- a/lib/nghttp2_session.c
+++ b/lib/nghttp2_session.c
@@ -595,11 +595,7 @@ static int session_new(nghttp2_session **session_ptr,
     }
   }
 
-  rv = nghttp2_pq_init(&(*session_ptr)->ob_data, stream_less, mem);
-  if (rv != 0) {
-    assert(0);
-    abort();
-  }
+  nghttp2_pq_init(&(*session_ptr)->ob_data, stream_less, mem);
 
   return 0;