diff --git a/packages/core/pattern.mjs b/packages/core/pattern.mjs
index 2c1dcfce9..c5b7953c9 100644
--- a/packages/core/pattern.mjs
+++ b/packages/core/pattern.mjs
@@ -1158,7 +1158,6 @@ const COMPOSERS = {
   div: [numeralArgs((a, b) => a / b)],
   mod: [numeralArgs(_mod)],
   pow: [numeralArgs(Math.pow)],
-  log2: [numeralArgs(Math.log2)],
   band: [numeralArgs((a, b) => a & b)],
   bor: [numeralArgs((a, b) => a | b)],
   bxor: [numeralArgs((a, b) => a ^ b)],
@@ -1864,6 +1863,8 @@ export const floor = register('floor', function (pat) {
   return pat.asNumber().fmap((v) => Math.floor(v));
 });
 
+export const log2 = register('log2', (pat) => pat.asNumber().fmap((v) => Math.log2(v)));
+
 /**
  * Assumes a numerical pattern. Returns a new pattern with all values set to
  * their mathematical ceiling. E.g. `3.2` replaced with `4`, and `-4.2`
diff --git a/packages/core/signal.mjs b/packages/core/signal.mjs
index 2f9fe4b18..353ce25bf 100644
--- a/packages/core/signal.mjs
+++ b/packages/core/signal.mjs
@@ -316,7 +316,7 @@ export const run = (n) => saw.range(0, n).round().segment(n);
  * // "hh".s().struct("1 0 1")
  */
 export const binary = (n) => {
-  const nBits = reify(n).log2(0).floor().add(1);
+  const nBits = reify(n).log2().floor().add(1);
   return binaryN(n, nBits);
 };
 
@@ -348,7 +348,7 @@ export const binaryN = (n, nBits = 16) => {
  *   .partials(binaryL(irand(4096).add(1)))
  */
 export const binaryL = (n) => {
-  const nBits = reify(n).log2(0).floor().add(1);
+  const nBits = reify(n).log2().floor().add(1);
   return binaryNL(n, nBits);
 };