diff --git a/var/spack/repos/builtin/packages/m4/package.py b/var/spack/repos/builtin/packages/m4/package.py
index 71ed3d1da4c..c86fcbefdb7 100644
--- a/var/spack/repos/builtin/packages/m4/package.py
+++ b/var/spack/repos/builtin/packages/m4/package.py
@@ -40,6 +40,9 @@ def configure_args(self):
         if spec.satisfies('%arm') and not spec.satisfies('platform=darwin'):
             args.append('LDFLAGS=-rtlib=compiler-rt')
 
+        if spec.satisfies('%fj') and not spec.satisfies('platform=darwin'):
+            args.append('LDFLAGS=-rtlib=compiler-rt')
+
         if spec.satisfies('%intel'):
             args.append('CFLAGS=-no-gcc')