--- /dev/null
+diff -ur avogadro-1.2.0/libavogadro/src/extensions/symmetry/libmsym/src/orbital.c avogadro-1.2.0.build/libavogadro/src/extensions/symmetry/libmsym/src/orbital.c
+--- avogadro-1.2.0/libavogadro/src/extensions/symmetry/libmsym/src/orbital.c 2016-06-08 16:19:45.000000000 +0200
++++ avogadro-1.2.0.build/libavogadro/src/extensions/symmetry/libmsym/src/orbital.c 2017-04-13 11:56:21.795761712 +0200
+@@ -67,13 +67,13 @@
+ }
+ case 2 : {
+ //o->v = dpolynomial[m+l];
+- char *d = (signbit(m) == 1 ? "-" : "+");
++ char *d = (m < 0 ? "-" : "+");
+ snprintf(o->name, sizeof(o->name), "%dd%d%s",n,abs(m),d);
+ break;
+ }
+ default : {
+ char t = 'f' - 3 + l;
+- char *d = (signbit(m) == 1 ? "-" : "+");
++ char *d = (m < 0 ? "-" : "+");
+ snprintf(o->name, sizeof(o->name), "%d%c%d%s",n,t,abs(m),d);
+ }
+ }