spelling fix

diff --git a/lib/autoconf/fortran.m4 b/lib/autoconf/fortran.m4
index 5dd704e4f71ca2389966d51948434b57aceeb87d..e29a75c581ab8459d475fa8695cf0328889ffde1 100644 (file)
--- a/lib/autoconf/fortran.m4
+++ b/lib/autoconf/fortran.m4
@@ -222,7 +222,7 @@ AU_DEFUN([ac_cv_prog_g77],
 # ---------------------------
 # COMPILERS is a space separated list of Fortran 77 compilers to search
 # for.
-# Fortran 95 isn't strictly backwards-compatiable with Fortran 77, but
+# Fortran 95 isn't strictly backwards-compatible with Fortran 77, but
 # `f95' is worth trying.
 #
 # Compilers are ordered by