diff --git a/scheme/ikarus.not-yet-implemented.ss b/scheme/ikarus.not-yet-implemented.ss
index 5c2b40f..fbc9872 100644
--- a/scheme/ikarus.not-yet-implemented.ss
+++ b/scheme/ikarus.not-yet-implemented.ss
@@ -1,7 +1,6 @@
 
 (library (ikarus not-yet-implemented)
   (export 
-    make-polar 
     bitwise-copy-bit-field bitwise-reverse-bit-field
     bitwise-rotate-bit-field bitwise-if fxreverse-bit-field
     fxrotate-bit-field 
@@ -17,7 +16,6 @@
     string-upcase)
 
   (import (except (ikarus) 
-    make-polar 
     bitwise-copy-bit-field bitwise-reverse-bit-field
     bitwise-rotate-bit-field bitwise-if fxreverse-bit-field
     fxrotate-bit-field 
@@ -57,7 +55,6 @@
   (not-yet 
     ;;; should be implemented
     string-downcase string-titlecase string-upcase
-    make-polar 
     bitwise-if
     bitwise-rotate-bit-field bitwise-copy-bit-field bitwise-reverse-bit-field
     fxreverse-bit-field fxrotate-bit-field 
diff --git a/scheme/ikarus.numerics.ss b/scheme/ikarus.numerics.ss
index 051c691..be39369 100644
--- a/scheme/ikarus.numerics.ss
+++ b/scheme/ikarus.numerics.ss
@@ -3620,11 +3620,11 @@
 
 
 (library (ikarus complex-numbers)
-  (export make-rectangular $make-rectangular
+  (export make-rectangular $make-rectangular make-polar
           real-part imag-part angle magnitude)
   (import 
-    (except (ikarus)
-      make-rectangular real-part imag-part angle magnitude)
+    (except (ikarus) make-rectangular make-polar
+          real-part imag-part angle magnitude)
     (except (ikarus system $compnums) $make-rectangular))
 
   (define ($make-rectangular r i)
@@ -3655,6 +3655,16 @@
          [else (err r)])]
       [else (err i)]))
 
+  (define (make-polar mag angle)
+    (define who 'make-polar)
+    (unless (number? mag)
+      (die who "not a number" mag))
+    (unless (number? angle)
+      (die who "not a number" angle))
+    (make-rectangular 
+      (* mag (cos angle))
+      (* mag (sin angle))))
+
   (define magnitude
     (lambda (x)
       (cond
diff --git a/scheme/ikarus.string-to-number.ss b/scheme/ikarus.string-to-number.ss
index 9fc38b2..d20d51b 100755
--- a/scheme/ikarus.string-to-number.ss
+++ b/scheme/ikarus.string-to-number.ss
@@ -205,7 +205,7 @@
       [(#\i)
        (let ([real (do-dec-sn/ex sn ex (* ac (expt 10 exp)))])
          (next im:done (make-rectangular 0.0 real)))]
-      [(#\e)
+      [(#\e #\E #\s #\S #\f #\F #\d #\D #\l #\L)
        (if (fx=? r 10)
            (next exponent r ex sn ac exp)
            (fail))])
@@ -218,7 +218,7 @@
       [(#\i)
        (let ([imag (do-dec-sn/ex sn ex (* ac (expt 10 exp)))])
          (next im:done (make-rectangular real imag)))]
-      [(#\e)
+      [(#\e #\E #\s #\S #\f #\F #\d #\D #\l #\L)
        (next im:exponent r real ex sn ac exp)])
 
     (digit+ (r ex sn ac)
@@ -238,7 +238,7 @@
          (next im:sign r real ex -1))]
       [(#\i)
        (next im:done (make-rectangular 0 (do-sn/ex sn ex ac)))]
-      [(#\e)
+      [(#\e #\E #\s #\S #\f #\F #\d #\D #\l #\L)
        (if (fx=? r 10) 
            (next exponent r ex sn ac 0)
            (fail))])
@@ -252,12 +252,12 @@
            (fail))]
       [(#\/)
        (next im:ratio r real ex sn ac)]
-      [(#\e)
+      [(#\i)
+       (next im:done (make-rectangular real (do-sn/ex sn ex ac)))]
+      [(#\e #\E #\s #\S #\f #\F #\d #\D #\l #\L)
        (if (fx=? r 10)
            (next im:exponent r real ex sn ac 0)
-           (fail))]
-      [(#\i)
-       (next im:done (make-rectangular real (do-sn/ex sn ex ac)))])
+           (fail))])
 
     (sign-i (r ex sn)
       [(eof)
diff --git a/scheme/last-revision b/scheme/last-revision
index 1fd9918..bf9b507 100644
--- a/scheme/last-revision
+++ b/scheme/last-revision
@@ -1 +1 @@
-1539
+1540
diff --git a/scheme/tests/string-to-number.ss b/scheme/tests/string-to-number.ss
index 5577224..eadeca1 100644
--- a/scheme/tests/string-to-number.ss
+++ b/scheme/tests/string-to-number.ss
@@ -239,6 +239,7 @@
     (test "-0e-0" -0.0)
     (test "#d-0e-10-0e-0i" (make-rectangular -0.0 -0.0))
     (test "-0.i" (make-rectangular 0.0 -0.0))
+    (test "#d#e-0.0f-0-.0s-0i" 0)
 
     )