diff --git a/README.md b/README.md
index febdf0941..f35c4a43e 100644
--- a/README.md
+++ b/README.md
@@ -97,9 +97,9 @@ Then, select one of the following targets and `make` it according to your purpos
 
 | Target      | Description
 |-------------|-------------
-| `all`       | Build shared-library `libmeevax.0.5.292.so` and executable `meevax`.
+| `all`       | Build shared-library `libmeevax.0.5.293.so` and executable `meevax`.
 | `install`   | Copy files into `/usr/local` directly.
-| `package`   | Generate debian package `meevax_0.5.292_amd64.deb` (only Ubuntu). The generated package can be installed by `sudo apt install build/meevax_0.5.292_amd64.deb`.
+| `package`   | Generate debian package `meevax_0.5.293_amd64.deb` (only Ubuntu). The generated package can be installed by `sudo apt install build/meevax_0.5.293_amd64.deb`.
 | `test`      | Test executable `meevax`. This target requires Valgrind to be installed.
 | `uninstall` | Remove files copied to `/usr/local` directly by target `install`.
 
diff --git a/VERSION b/VERSION
index d9d175dac..46f9dddd7 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.5.292
+0.5.293
diff --git a/basis/srfi-144.ss b/basis/srfi-144.ss
index 283145981..480a6ea93 100644
--- a/basis/srfi-144.ss
+++ b/basis/srfi-144.ss
@@ -13,6 +13,7 @@
             binary64-integral-part
             binary64-least
             binary64-log-binary
+            binary64-log1p
             binary64-max
             binary64-min
             binary64-normalized-fraction
@@ -56,6 +57,7 @@
             or
             positive?
             round
+            square
             truncate
             values
             zero?
@@ -94,9 +96,9 @@
           flmax flmin fl+ fl* fl+* fl- fl/ flabs flabsdiff flposdiff flsgn
           flnumerator fldenominator flfloor flceiling flround fltruncate
 
-          flexp flexp2 flexp-1
-          ; flsquare flsqrt flcbrt flhypot flexpt fllog
-          ; fllog1+ fllog2 fllog10 make-fllog-base
+          flexp flexp2 flexp-1 flsquare flsqrt flcbrt flhypot flexpt fllog
+          fllog1+
+          ; fllog2 fllog10 make-fllog-base
           ;
           ; flsin flcos fltan flasin flacos flatan
           ; flsinh flcosh fltanh flasinh flacosh flatanh
@@ -303,5 +305,22 @@
            (expt 2 x))
 
          (define flexp-1 binary64-expm1)
+
+         (define flsquare square)
+
+         (define flsqrt sqrt)
+
+         (define (flcbrt x)
+           (expt x (/ 1 3)))
+
+         (define (flhypot x y)
+           (sqrt (+ (square x)
+                    (square y))))
+
+         (define flexpt expt)
+
+         (define fllog log)
+
+         (define fllog1+ binary64-log1p)
          )
   )
diff --git a/src/kernel/boot.cpp b/src/kernel/boot.cpp
index 22f0c4940..b12a018e1 100644
--- a/src/kernel/boot.cpp
+++ b/src/kernel/boot.cpp
@@ -685,6 +685,11 @@ namespace meevax::inline kernel
       {
         return make(std::expm1(car(xs).as<double>()));
       });
+
+      library.define<procedure>("binary64-log1p", [](let const& xs)
+      {
+        return make(std::log1p(car(xs).as<double>()));
+      });
     });
 
     define<library>("(meevax list)", [](library & library)
diff --git a/test/srfi-144.ss b/test/srfi-144.ss
index 71d3014c8..338271194 100644
--- a/test/srfi-144.ss
+++ b/test/srfi-144.ss
@@ -1,4 +1,5 @@
 (import (scheme base)
+        (scheme inexact)
         (scheme process-context)
         (srfi 78)
         (srfi 144))
@@ -261,6 +262,84 @@
 
 (check (fl+ 1.0 (flexp-1 fl-least)) => 1.0)
 
+(check (flsquare -0.0) => 0.0)
+
+(check (flsquare 0.0) => 0.0)
+
+(check (flsquare 1.0) => 1.0)
+
+(check (flsquare 2.0) => 4.0)
+
+(check (flsqrt -0.0) => -0.0)
+
+(check (flsqrt 0.0) => 0.0)
+
+(check (flsqrt 1.0) => 1.0)
+
+(check (flsqrt 2.0) => fl-sqrt-2)
+
+(check (flsqrt 3.0) => fl-sqrt-3)
+
+(check (flsqrt 5.0) => fl-sqrt-5)
+
+(check (flsqrt 10.0) => fl-sqrt-10)
+
+(check (flcbrt 0.0) => 0.0)
+
+(check (flcbrt 1.0) => 1.0)
+
+(check (flcbrt 1.0) => 1.0)
+
+(check (flcbrt 2.0) => fl-cbrt-2)
+
+(check (flcbrt 3.0) => fl-cbrt-3)
+
+(check (flhypot 0.0 0.0) => 0.0)
+
+(check (flhypot 0.0 1.0) => 1.0)
+
+(check (flhypot 0.0 -1.0) => 1.0)
+
+(check (flhypot 1.0 1.0) => fl-sqrt-2)
+
+(check (flhypot 1.0 2.0) => fl-sqrt-5)
+
+(check (flhypot 1.0 3.0) => fl-sqrt-10)
+
+(check (flexpt 0.0 0.0) => 1.0)
+
+(check (flexpt 1.0 0.0) => 1.0)
+
+(check (flexpt 2.0 1.0) => 2.0)
+
+(check (flexpt 2.0 2.0) => 4.0)
+
+(check (flexpt 2.0 3.0) => 8.0)
+
+(check (fllog 0.0) => -inf.0)
+
+(check (fllog 1.0) => 0.0)
+
+(check (fllog fl-phi) => fl-log-phi)
+
+(check (fllog 2.0) => fl-log-2)
+
+(check (fllog 3.0) => fl-log-3)
+
+(check (fllog fl-pi) => fl-log-pi)
+
+(check (fllog 10.0) => fl-log-10)
+
+(check (fllog1+ 0.0) => 0.0)
+
+(check (fllog1+ fl-least) (=> =) 0.0)
+
+(check (fllog1+ 1.0) => fl-log-2)
+
+(check (fllog1+ 2.0) (=> =) fl-log-3)
+
+(check (fllog1+ 9.0) => fl-log-10)
+
 (check-report)
 
-(exit (check-passed? 127))
+(exit (check-passed? 166))