diff --git a/.gitattributes b/.gitattributes
index c809f66f05862a289fd4b1fc8784909a97a7476a..cd18ea6f12f288e08f90dc2bc0f580425492f5c6 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -452,6 +452,7 @@ testfont binary
 /src/modules/_Roxen/Makefile.in foreign_ident
 /src/modules/_Roxen/configure.in foreign_ident
 /src/modules/_math/Makefile.in foreign_ident
+/src/modules/_math/acconfig.h foreign_ident
 /src/modules/_math/configure.in foreign_ident
 /src/modules/_math/math.c foreign_ident
 /src/modules/call_out/Makefile.in foreign_ident
diff --git a/src/modules/_math/acconfig.h b/src/modules/_math/acconfig.h
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..778bd3f0d383b620a2d79995fa06ba169f1bb578 100644
--- a/src/modules/_math/acconfig.h
+++ b/src/modules/_math/acconfig.h
@@ -0,0 +1,11 @@
+/* $Id: acconfig.h,v 1.2 2000/08/28 20:52:29 grubba Exp $
+ *
+ * acconfig.h for _math.
+ */
+
+@TOP@
+
+/* Define if <math.h> defines FP_RZ */
+#undef HAVE_FP_RZ
+
+@BOTTOM@