diff --git a/src/util/bitscan.h b/src/util/bitscan.h
index acdde6e7063..3da2e9639e4 100644
--- a/src/util/bitscan.h
+++ b/src/util/bitscan.h
@@ -122,13 +122,13 @@ u_bit_scan64(uint64_t *mask)
         ((b) = ffsll(__dword) - 1, __dword);      \
         __dword &= ~(1ull << (b)))
 
-/* Determine if an unsigned value is a power of two.
+/* Determine if an uint32_t value is a power of two.
  *
  * \note
  * Zero is treated as a power of two.
  */
 static inline bool
-util_is_power_of_two_or_zero(unsigned v)
+util_is_power_of_two_or_zero(uint32_t v)
 {
    return IS_POT(v);
 }
@@ -144,13 +144,13 @@ util_is_power_of_two_or_zero64(uint64_t v)
    return IS_POT(v);
 }
 
-/* Determine if an unsigned value is a power of two.
+/* Determine if an uint32_t value is a power of two.
  *
  * \note
  * Zero is \b not treated as a power of two.
  */
 static inline bool
-util_is_power_of_two_nonzero(unsigned v)
+util_is_power_of_two_nonzero(uint32_t v)
 {
    /* __POPCNT__ is different from HAVE___BUILTIN_POPCOUNT.  The latter
     * indicates the existence of the __builtin_popcount function.  The former