diff --git a/CHANGELOG.md b/CHANGELOG.md
index e26794db203..5637bb014d7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -20,6 +20,8 @@ Current Trunk
 - Replace the `BINARYEN_ROOT` environment variable (used by developers who are
   doing out-of-tree builds of binaryen) with `BINARYEN_BIN` (#9023)
 - Reject non-natural alignment for atomic memory operations at parse time (#8962)
+- Note that fast-math mode can ignore the difference between negative zero and
+  zero (like clang and gcc). (#9056)
 
 v132
 ----
diff --git a/src/tools/optimization-options.h b/src/tools/optimization-options.h
index 1e089f0b8c8..a43c92c3fe7 100644
--- a/src/tools/optimization-options.h
+++ b/src/tools/optimization-options.h
@@ -306,7 +306,8 @@ struct OptimizationOptions : public ToolOptions {
       .add(
         "--fast-math",
         "-ffm",
-        "Optimize floats without handling corner cases of NaNs and rounding",
+        "Optimize floats without handling corner cases of NaNs, rounding, and "
+        "negative zero",
         OptimizationOptionsCategory,
         Options::Arguments::Zero,
         [this](Options*, const std::string&) { passOptions.fastMath = true; })
diff --git a/test/lit/help/wasm-metadce.test b/test/lit/help/wasm-metadce.test
index 5b11778ce3c..aef42e966d8 100644
--- a/test/lit/help/wasm-metadce.test
+++ b/test/lit/help/wasm-metadce.test
@@ -679,8 +679,8 @@
 ;; CHECK-NEXT:                                                 application
 ;; CHECK-EMPTY:
 ;; CHECK-NEXT:   --fast-math,-ffm                              Optimize floats without handling
-;; CHECK-NEXT:                                                 corner cases of NaNs and 
-;; CHECK-NEXT:                                                 rounding
+;; CHECK-NEXT:                                                 corner cases of NaNs, rounding, 
+;; CHECK-NEXT:                                                 and negative zero
 ;; CHECK-EMPTY:
 ;; CHECK-NEXT:   --zero-filled-memory,-uim                     Assume that an imported memory 
 ;; CHECK-NEXT:                                                 will be zero-initialized
diff --git a/test/lit/help/wasm-opt.test b/test/lit/help/wasm-opt.test
index 12add8d5783..95892a9cc86 100644
--- a/test/lit/help/wasm-opt.test
+++ b/test/lit/help/wasm-opt.test
@@ -715,8 +715,8 @@
 ;; CHECK-NEXT:                                                 application
 ;; CHECK-EMPTY:
 ;; CHECK-NEXT:   --fast-math,-ffm                              Optimize floats without handling
-;; CHECK-NEXT:                                                 corner cases of NaNs and 
-;; CHECK-NEXT:                                                 rounding
+;; CHECK-NEXT:                                                 corner cases of NaNs, rounding, 
+;; CHECK-NEXT:                                                 and negative zero
 ;; CHECK-EMPTY:
 ;; CHECK-NEXT:   --zero-filled-memory,-uim                     Assume that an imported memory 
 ;; CHECK-NEXT:                                                 will be zero-initialized
diff --git a/test/lit/help/wasm2js.test b/test/lit/help/wasm2js.test
index da53bd71492..97f04ac9a7e 100644
--- a/test/lit/help/wasm2js.test
+++ b/test/lit/help/wasm2js.test
@@ -643,8 +643,8 @@
 ;; CHECK-NEXT:                                                 application
 ;; CHECK-EMPTY:
 ;; CHECK-NEXT:   --fast-math,-ffm                              Optimize floats without handling
-;; CHECK-NEXT:                                                 corner cases of NaNs and 
-;; CHECK-NEXT:                                                 rounding
+;; CHECK-NEXT:                                                 corner cases of NaNs, rounding, 
+;; CHECK-NEXT:                                                 and negative zero
 ;; CHECK-EMPTY:
 ;; CHECK-NEXT:   --zero-filled-memory,-uim                     Assume that an imported memory 
 ;; CHECK-NEXT:                                                 will be zero-initialized