diff --git a/doc/guides/rel_notes/release_21_08.rst b/doc/guides/rel_notes/release_21_08.rst
index 9904a0e390..de76d69c4e 100644
--- a/doc/guides/rel_notes/release_21_08.rst
+++ b/doc/guides/rel_notes/release_21_08.rst
@@ -202,6 +202,10 @@ API Changes
 * eal: ``rte_strscpy`` sets ``rte_errno`` to ``E2BIG`` in case of string
   truncation.
 
+* eal: ``rte_bsf32_safe`` now takes a 32-bit value for its first argument.
+  This fixes warnings about loss of precision
+  when used with some compilers settings.
+
 * eal: ``rte_power_monitor`` and the ``rte_power_monitor_cond`` struct changed
   to use a callback mechanism.
 
diff --git a/lib/eal/include/rte_common.h b/lib/eal/include/rte_common.h
index d5a32c66a5..99eb5f1820 100644
--- a/lib/eal/include/rte_common.h
+++ b/lib/eal/include/rte_common.h
@@ -623,7 +623,7 @@ rte_bsf32(uint32_t v)
  *     Returns 0 if ``v`` was 0, otherwise returns 1.
  */
 static inline int
-rte_bsf32_safe(uint64_t v, uint32_t *pos)
+rte_bsf32_safe(uint32_t v, uint32_t *pos)
 {
 	if (v == 0)
 		return 0;