diff --git a/gnu/packages/finance.scm b/gnu/packages/finance.scm
index f0093ba635..1427735a9e 100644
--- a/gnu/packages/finance.scm
+++ b/gnu/packages/finance.scm
@@ -1768,7 +1768,17 @@ editing on the Web.")
         (base32 "0lf69nna0aahwpgd9m9yjzbv2fbfn081djfznssa84f0n7y1xx4z"))))
     (build-system gnu-build-system)
     (arguments
-     `(;; Parallel build fails with:
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'link-math-library
+           (lambda _
+             (substitute* "src/Makefile.am"
+               (("ta_common/libta_common.la")
+                "ta_common/libta_common.la -lm"))
+             (substitute* "src/Makefile.in"
+               (("\\$\\(libta_lib_la_LDFLAGS\\) \\$\\(LDFLAGS\\) -o \\$@")
+                "$(libta_lib_la_LDFLAGS) $(LDFLAGS) -lm -o $@")))))
+       ;; Parallel build fails with:
        ;; mv -f .deps/gen_code-gen_code.Tpo .deps/gen_code-gen_code.Po
        ;; mv: cannot stat '.deps/gen_code-gen_code.Tpo': No such file or directory
        ;; Makefile:254: recipe for target 'gen_code-gen_code.o' failed