diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index 2ce096bf..539b26bb 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -51,6 +51,6 @@ jobs:
         pwd
         $SBCL_SRC/run-sbcl.sh --script script.lisp
         echo $LIBRARY_PATH
-        gcc -Wall -fPIC -shared -o libcalc.dll libcalc.c -Wl,--whole-archive -lsbcl -Wl,--no-whole-archive -ladvapi32 -lsynchronization -lws2_32 -lzstd
+        gcc -Wall -fPIC -shared -o libcalc.dll libcalc.c -Wl,--export-all-symbols -Wl,--whole-archive -lsbcl -Wl,--no-whole-archive -ladvapi32 -lsynchronization -lws2_32 -lzstd
         gcc -Wall -o example example.c -lcalc
         echo "(+ 1 2)" | ./example.exe
\ No newline at end of file