diff --git a/lib/srfi/144.sld b/lib/srfi/144.sld
index 0b8861ee..2323045e 100644
--- a/lib/srfi/144.sld
+++ b/lib/srfi/144.sld
@@ -25,7 +25,8 @@
    fl-sqrt-2 fl-sqrt-3 fl-sqrt-5 fl-sqrt-10 fl-1/sqrt-2
    fl-cbrt-2 fl-cbrt-3 fl-4thrt-2 fl-phi fl-log-phi fl-1/log-phi
    fl-euler fl-e-euler fl-sin-1 fl-cos-1 fl-greatest fl-least
-   fl-integer-exponent-zero fl-integer-exponent-nan fl-fast-+*
+   fl-epsilon fl-integer-exponent-zero fl-integer-exponent-nan 
+   fl-fast-+*
 
    flonum flonum? fl=? fl<? fl>? fl<=? fl>=? flodd? fleven?
    flunordered? flinteger? flzero? flpositive? flnegative?
diff --git a/lib/srfi/144/math.stub b/lib/srfi/144/math.stub
index 8e7cef37..b6ebf5d5 100644
--- a/lib/srfi/144/math.stub
+++ b/lib/srfi/144/math.stub
@@ -33,7 +33,8 @@
   (fl-greatest "DBL_MAX")
   (fl-least "-DBL_MAX")
   (fl-integer-exponent-zero "FP_ILOGB0")
-  (fl-integer-exponent-nan "FP_ILOGBNAN"))
+  (fl-integer-exponent-nan "FP_ILOGBNAN")
+  (fl-epsilon "DBL_EPSILON"))
 
 (define-c-const int
   FP_SUBNORMAL)