diff --git a/src/lib/format-string.cpp b/src/lib/format-string.cpp
index 82a9d7ea0..bea186abb 100644
--- a/src/lib/format-string.cpp
+++ b/src/lib/format-string.cpp
@@ -186,10 +186,10 @@ namespace util {
   
   template void _Fmt::format (const char,    Implementation&);
   template void _Fmt::format (const uchar,   Implementation&);
-  template void _Fmt::format (const int,     Implementation&);
-  template void _Fmt::format (const uint,    Implementation&);
-  template void _Fmt::format (const short,   Implementation&);
-  template void _Fmt::format (const ushort,  Implementation&);
+  template void _Fmt::format (const int16_t, Implementation&);
+  template void _Fmt::format (const uint16_t,Implementation&);
+  template void _Fmt::format (const int32_t, Implementation&);
+  template void _Fmt::format (const uint32_t,Implementation&);
   template void _Fmt::format (const int64_t, Implementation&);
   template void _Fmt::format (const uint64_t,Implementation&);
   template void _Fmt::format (const float,   Implementation&);
@@ -197,6 +197,10 @@ namespace util {
   template void _Fmt::format (const string,  Implementation&);
   template void _Fmt::format (const void *,  Implementation&);
   template void _Fmt::format (const char *,  Implementation&);
+#ifndef __x86_64__
+  template void _Fmt::format (const long,    Implementation&);
+  template void _Fmt::format (const ulong,   Implementation&);
+#endif
   
   
   
diff --git a/src/lib/format-string.hpp b/src/lib/format-string.hpp
index 1f4c4033e..fa884b174 100644
--- a/src/lib/format-string.hpp
+++ b/src/lib/format-string.hpp
@@ -247,14 +247,18 @@ namespace util {
     template<> struct _allow_call<string>  { enum{ value = true }; };
     template<> struct _allow_call<char>    { enum{ value = true }; };
     template<> struct _allow_call<uchar>   { enum{ value = true }; };
-    template<> struct _allow_call<int>     { enum{ value = true }; };
-    template<> struct _allow_call<uint>    { enum{ value = true }; };
-    template<> struct _allow_call<short>   { enum{ value = true }; };
-    template<> struct _allow_call<ushort>  { enum{ value = true }; };
+    template<> struct _allow_call<int16_t> { enum{ value = true }; };
+    template<> struct _allow_call<uint16_t>{ enum{ value = true }; };
+    template<> struct _allow_call<int32_t> { enum{ value = true }; };
+    template<> struct _allow_call<uint32_t>{ enum{ value = true }; };
     template<> struct _allow_call<int64_t> { enum{ value = true }; };
     template<> struct _allow_call<uint64_t>{ enum{ value = true }; };
     template<> struct _allow_call<float>   { enum{ value = true }; };
     template<> struct _allow_call<double>  { enum{ value = true }; };
+#ifndef __x86_64__
+    template<> struct _allow_call<long>    { enum{ value = true }; };
+    template<> struct _allow_call<ulong>   { enum{ value = true }; };
+#endif
     
     template<typename X>
     struct _shall_format_directly
diff --git a/tests/40core.tests b/tests/40core.tests
index 73487887a..063202d21 100644
--- a/tests/40core.tests
+++ b/tests/40core.tests
@@ -310,7 +310,7 @@ END
 
 TEST "formatting by string template" FormatString_test <<END
 out-lit: --format-template--int=0012--double=+1.23--string=Lumiera  --
-out: 0x....+ _____ .
+out: 0x....+ _____+ .
 out: «.+util.+test.+Silent.»
 out-lit: __nix_
 out-lit: ____