diff -u regina-normal-4.96/debian/changelog regina-normal-4.96/debian/changelog
--- regina-normal-4.96/debian/changelog
+++ regina-normal-4.96/debian/changelog
@@ -1,3 +1,10 @@
+regina-normal (4.96-2.1) unstable; urgency=medium
+
+  * Non-maintainer upload.
+  * Fix FTBFS due to ambiguous call of overloaded method. (Closes: #808456)
+
+ -- Anton Gladky <gladk@debian.org>  Sat, 02 Jan 2016 00:00:47 +0100
+
 regina-normal (4.96-2) unstable; urgency=low
 
   * Now installs the utility /usr/bin/censuslookup, which was inadvertently
only in patch2:
unchanged:
--- regina-normal-4.96.orig/engine/enumerate/normaliz/HilbertSeries.cpp
+++ regina-normal-4.96/engine/enumerate/normaliz/HilbertSeries.cpp
@@ -349,7 +349,7 @@
     //divide by gcd //TODO operate directly on vector
     Matrix<mpz_class> QP(quasi_poly);
     mpz_class g = QP.matrix_gcd();
-    g = gcd(g,quasi_denom);
+    g = gcd<mpz_class>(g,quasi_denom);
     quasi_denom /= g;
     QP.scalar_division(g);
     quasi_poly = QP.get_elements();
only in patch2:
unchanged:
--- regina-normal-4.96.orig/engine/enumerate/normaliz/sublattice_representation.cpp
+++ regina-normal-4.96/engine/enumerate/normaliz/sublattice_representation.cpp
@@ -153,7 +153,7 @@
     
     //check if a factor can be extraced from B  //TODO necessary?
     Integer g = B.matrix_gcd();
-    g = gcd(g,c);  //TODO necessary??
+    g = gcd<Integer>(g,c);  //TODO necessary??
     if (g > 1) {
         c /= g;
         B.scalar_division(g);
only in patch2:
unchanged:
--- regina-normal-4.96.orig/engine/enumerate/normaliz/vector_operations.cpp
+++ regina-normal-4.96/engine/enumerate/normaliz/vector_operations.cpp
@@ -167,7 +167,7 @@
     size_t i, size=v.size();
     Integer g=0;
     for (i = 0; i < size; i++) {
-        g=gcd(g,v[i]);
+        g=gcd<Integer>(g,v[i]);
         if (g==1) {
             return 1;
         }
@@ -182,7 +182,7 @@
     size_t i,size=v.size();
     Integer g=1;
     for (i = 0; i < size; i++) {
-        g=lcm(g,v[i]);
+        g=lcm<Integer>(g,v[i]);
         if (g==0) {
             return 0;
         }