2 files changed, 2 insertions, 1 deletions
diff --git a/src/stdlib/bigint.c b/src/stdlib/bigint.c
index be01a001..5e8986d1 100644
--- a/src/stdlib/bigint.c
+++ b/src/stdlib/bigint.c
@@ -393,7 +393,7 @@ PUREFUNC Closure_t Int$onward(Int_t first, Int_t step) {
 }
 
 public
-Int_t Int$from_str(const char *str) {
+OptionalInt_t Int$from_str(const char *str) {
     mpz_t i;
     int result;
     if (strncmp(str, "0x", 2) == 0) {
diff --git a/src/stdlib/bigint.h b/src/stdlib/bigint.h
index 87f77058..e50a6847 100644
--- a/src/stdlib/bigint.h
+++ b/src/stdlib/bigint.h
@@ -23,6 +23,7 @@ Text_t Int$hex(Int_t i, Int_t digits, bool uppercase, bool prefix);
 Text_t Int$octal(Int_t i, Int_t digits, bool prefix);
 PUREFUNC Closure_t Int$to(Int_t first, Int_t last, OptionalInt_t step);
 PUREFUNC Closure_t Int$onward(Int_t first, Int_t step);
+OptionalInt_t Int$from_str(const char *str);
 OptionalInt_t Int$parse(Text_t text, Text_t *remainder);
 Int_t Int$abs(Int_t x);
 Int_t Int$power(Int_t base, Int_t exponent);