diff --git a/common/dbgnew.hh b/common/dbgnew.hh
index c3164531bcbc7c5163125c7392dd3697d5292eb7..2f9ddbb6a48dbab92b3d9641f935849722e9f029 100644
--- a/common/dbgnew.hh
+++ b/common/dbgnew.hh
@@ -19,6 +19,8 @@
 
 #ifdef MEMORY_DEBUG
 
+#include <new>
+
 class debug_new_counter_t
 {
   static int count;
@@ -40,8 +42,15 @@ static debug_new_counter_t debug_new_counter;
 void* operator new(size_t size, const char* file, int line);
 void* operator new[](size_t size, const char* file, int line);
 
+// TODO: these might be GCC version dependant
+void* operator new(size_t size, const std::nothrow_t&, const char* file, int line);
+void* operator new[](size_t size, const std::nothrow_t&, const char* file, int line);
+
+inline void* operator new(size_t, void* __p, const char*, int) { return __p; }
+inline void* operator new[](size_t, void* __p, const char*, int) { return __p; }
+
 // Redirect "normal" new to memory-tracking placement new.
-#define new new(__FILE__, __LINE__)
+#define new(...) new(__VA_ARGS__, __FILE__, __LINE__)
 
 #endif // MEMORY_DEBUG
 
diff --git a/common/memory.h b/common/memory.h
index 9ae9d88c79309360a4d8918cabbd2113da64158a..6f4a3f8071d88608ed2d7453fe9de670a8bb2284 100644
--- a/common/memory.h
+++ b/common/memory.h
@@ -143,7 +143,7 @@ extern "C" {
 #if defined(__GNUC__) && __GNUC__ < 3
 #  define mprintf(f, args...) mprintf_dbg(__FILE__, __LINE__, f, ## args)
 #else
-#  define mprintf(f,...) mprintf_dbg(__FILE__, __LINE__, f, __VA_ARGS__)
+#  define mprintf(...) mprintf_dbg(__FILE__, __LINE__, __VA_ARGS__)
 #endif
 #endif
 
diff --git a/common/new.cc b/common/new.cc
index 1b1c43a2d25fc7a474d972451535442fb16bb2d1..fa26100a42f21eabc8797741e48ba4ac1135f108 100644
--- a/common/new.cc
+++ b/common/new.cc
@@ -13,7 +13,6 @@
  ******************************************************************************/
 #include "dbgnew.hh"
 #include <stddef.h>
-#include <new>
 
 #undef new
 
@@ -56,6 +55,17 @@ void* operator new[](size_t size, const char* file, int line)
     else return Malloc_dbg(file, line, size);
 }
 
+void* operator new(size_t size, const std::nothrow_t&, const char* file, int line)
+{
+    return Malloc_dbg(file, line, size);
+}
+
+void* operator new[](size_t size, const std::nothrow_t&, const char* file, int line)
+{
+    if (size == 0) return &dummy;
+    else return Malloc_dbg(file, line, size);
+}
+
 int debug_new_counter_t::count = 0; // initial value
 
 #if defined(__CYGWIN__) || defined(INTERIX)
diff --git a/core/Integer.cc b/core/Integer.cc
index 9ac1c32d853b23c680d5743638a72e14eb4df051..52f884e0e88a2055d2f4cfa1f2da079acd166f53 100644
--- a/core/Integer.cc
+++ b/core/Integer.cc
@@ -598,11 +598,11 @@ long long int INTEGER::get_long_long_val() const
   // It feels so bad accessing a BIGNUM directly, but faster than string
   // conversion...
   // I know, I had to fix this... Bence
-  if (BN_num_bytes(val.openssl) <= sizeof(BN_ULONG)) {
+  if ((size_t)BN_num_bytes(val.openssl) <= sizeof(BN_ULONG)) {
     return !is_negative ? BN_get_word(val.openssl) : -BN_get_word(val.openssl);
   }
   
-  unsigned num_bytes = BN_num_bytes(val.openssl);
+  int num_bytes = BN_num_bytes(val.openssl);
   unsigned char* tmp = (unsigned char*)Malloc(num_bytes * sizeof(unsigned char));
   BN_bn2bin(val.openssl, tmp);
   ret_val = tmp[0] & 0xff;
@@ -1308,7 +1308,7 @@ int INTEGER::RAW_encode_openssl(const TTCN_Typedescriptor_t& p_td,
   // Conversion to 2's complement.
   if (twos_compl) {
     BN_set_negative(D, 0);
-    unsigned num_bytes = BN_num_bytes(D);
+    int num_bytes = BN_num_bytes(D);
     unsigned char* tmp = (unsigned char*)Malloc(num_bytes * sizeof(unsigned char));
     BN_bn2bin(D, tmp);
     for (int a = 0; a < num_bytes; a++) tmp[a] = ~tmp[a];
diff --git a/core/LoggerPluginManager.cc b/core/LoggerPluginManager.cc
index 10a7fd7ec6c8996f0192ce128231fe0c21356302..09c427981e018f5e4aa13c3ed0a3961455462fab 100644
--- a/core/LoggerPluginManager.cc
+++ b/core/LoggerPluginManager.cc
@@ -1799,8 +1799,6 @@ LoggerPlugin *LoggerPluginManager::find_plugin(const char *name)
 #undef new
 #endif
 
-inline void * operator new (size_t, void * p) throw() { return p ; }
-
 LoggerPluginManager::ActiveEvent::ActiveEvent(bool fake_event, event_destination_t dest)
 : event_()
 , event_str_(NULL)