diff --git a/doc/APIchanges b/doc/APIchanges
index 1332694820..4753463c90 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -15,6 +15,9 @@ libavutil:     2017-10-21
 
 API changes, most recent first:
 
+2021-02-xx - xxxxxxxxxx - lavu 56.xx.100 - common.h
+  Add FFABS64U()
+
 2021-01-26 - xxxxxxxxxx - lavu 56.64.100 - common.h
   Add FFABSU()
 
diff --git a/libavutil/common.h b/libavutil/common.h
index a60a558b1d..5ccbed90b1 100644
--- a/libavutil/common.h
+++ b/libavutil/common.h
@@ -87,6 +87,7 @@
  * As with many macros, this evaluates its argument twice.
  */
 #define FFABSU(a) ((a) <= 0 ? -(unsigned)(a) : (unsigned)(a))
+#define FFABS64U(a) ((a) <= 0 ? -(uint64_t)(a) : (uint64_t)(a))
 
 /**
  * Comparator.
diff --git a/libavutil/version.h b/libavutil/version.h
index 21136e6cb7..b2165754f9 100644
--- a/libavutil/version.h
+++ b/libavutil/version.h
@@ -79,7 +79,7 @@
  */
 
 #define LIBAVUTIL_VERSION_MAJOR  56
-#define LIBAVUTIL_VERSION_MINOR  64
+#define LIBAVUTIL_VERSION_MINOR  65
 #define LIBAVUTIL_VERSION_MICRO 100
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \