diff --git a/src/core/fsservices.h b/src/core/fsservices.h
index d14f4bb..be457b6 100644
--- a/src/core/fsservices.h
+++ b/src/core/fsservices.h
@@ -66,7 +66,9 @@
 //=========================================================================
 
 #if IS_UNIX
-#include <sys/param.h>
+ #if HAVE_SYS_PARAM_H
+  #include <sys/param.h>
+ #endif
 #endif
 
 //=========================================================================
diff --git a/src/core/haval.cpp b/src/core/haval.cpp
index 3a10bbb..77c84b7 100644
--- a/src/core/haval.cpp
+++ b/src/core/haval.cpp
@@ -77,8 +77,13 @@
  *		in "../../include/byteorder.h" to get this information.
  */
 #include "stdcore.h"
+#include "config.h"
 #include <stdio.h>
-#include <memory.h>
+#ifdef HAVE_MEMORY_H
+ #include <memory.h>
+#else
+ #include <string.h>
+#endif
 #include "haval.h"
 #include "debug.h"
 
diff --git a/src/core/msystem.cpp b/src/core/msystem.cpp
index 39e3e21..60feef1 100644
--- a/src/core/msystem.cpp
+++ b/src/core/msystem.cpp
@@ -71,9 +71,12 @@
 /*
  * set, reset environment to be passed to mpopem
  */
+#include "config.h"
 #include <stdio.h>
 #include <sys/types.h>
-#include <sys/file.h>
+#ifndef _SORTIX_SOURCE
+# include <sys/file.h>
+#endif
 #include <sys/stat.h>
 #include <sys/wait.h>
 #include <time.h>
@@ -87,7 +90,9 @@
 #       include <unistd.h>
 #       include <stdlib.h>
 #endif
-#include <sys/param.h>
+#ifdef HAVE_SYS_PARAM_H
+# include <sys/param.h>
+#endif
 #include <assert.h>
 #include "msystem.h"
 
diff --git a/src/core/unixfsservices.cpp b/src/core/unixfsservices.cpp
index fb1771d..1222117 100644
--- a/src/core/unixfsservices.cpp
+++ b/src/core/unixfsservices.cpp
@@ -55,7 +55,9 @@
 #include <dirent.h>
 #include <sys/stat.h>
 #include <sys/time.h>
-#include <sys/param.h>
+#ifdef HAVE_SYS_PARAM_H
+# include <sys/param.h>
+#endif
 #ifdef HAVE_SYS_MOUNT_H
 # include <sys/mount.h>
 #endif
@@ -403,7 +405,7 @@ void cUnixFSServices::GetMachineNameFullyQualified( TSTRING& strName ) const
     char buf[256];
     if (gethostname(buf, 256) != 0)
     {
-#ifdef SOLARIS_NO_GETHOSTBYNAME
+#if defined(SOLARIS_NO_GETHOSTBYNAME) || defined(_SORTIX_SOURCE)
         strName = buf;
         return;
 #else
@@ -458,6 +460,7 @@ bool cUnixFSServices::GetIPAddress( uint32& uiIPAddress )
     bool    fGotAddress = false;    
     cDebug  d( _T("cUnixFSServices::GetIPAddress") );
 
+#ifndef _SORTIX_SOURCE
     struct utsname utsnameBuf;    
     if( EFAULT != uname( &utsnameBuf) )
     {
@@ -489,6 +492,7 @@ bool cUnixFSServices::GetIPAddress( uint32& uiIPAddress )
     }
     else
         d.TraceError( _T("uname failed") );
+#endif
 
     return( fGotAddress );
 }
diff --git a/src/core/wchar16.cpp b/src/core/wchar16.cpp
index a8b9ccc..6e7d7dd 100644
--- a/src/core/wchar16.cpp
+++ b/src/core/wchar16.cpp
@@ -35,10 +35,13 @@
 // Function and classes dealing with the WCHAR16 type
 //
 #include "stdcore.h"
+#include "config.h"
 #include "wchar16.h"
 #include "debug.h"
 #include <stdexcept> // for stl::out_of_range
-#include <memory.h>
+#ifdef HAVE_MEMORY_H
+# include <memory.h>
+#endif
 
 int wchar16len(const WCHAR16* s)
 {
diff --git a/src/cryptlib/misc.h b/src/cryptlib/misc.h
index 6d4c949..091c9ef 100644
--- a/src/cryptlib/misc.h
+++ b/src/cryptlib/misc.h
@@ -3,7 +3,11 @@
 
 #include "config.h"
 #include <assert.h>
-#include <memory.h>
+#ifdef HAVE_MEMORY_H
+ #include <memory.h>
+#else
+ #include <string.h>
+#endif
 #include <algorithm>
 
 inline unsigned int bitsToBytes(unsigned int bitCount)
diff --git a/src/tripwire/smtpmailmessage.cpp b/src/tripwire/smtpmailmessage.cpp
index 86adc1a..c838c53 100644
--- a/src/tripwire/smtpmailmessage.cpp
+++ b/src/tripwire/smtpmailmessage.cpp
@@ -54,6 +54,10 @@
 #include <arpa/inet.h>
 #include <sys/utsname.h>
 
+#ifdef _SORTIX_SOURCE
+# include <sys/select.h>
+#endif
+
 /* Some systems like Solaris and AIX don't define
  * INADDR_NONE, but it's pretty standard.  If not,
  * then the OS _should_ define it for us.
@@ -192,12 +196,16 @@ long cSMTPMailMessage::GetServerAddress()
 	}
 	else
 	{
+#ifdef _SORTIX_SOURCE
+		return INADDR_NONE;
+#else
 		// do a DNS lookup of the hostname and get the long
 		hostent *ent = mPfnGethostbyname(sNarrowString.c_str());
 		if (!ent)
 			return INADDR_NONE;
 		else
 			return *(long *)ent->h_addr_list[0];
+#endif
 	}
 }
 
diff --git a/src/twadmin/twadmincl.cpp b/src/twadmin/twadmincl.cpp
index 4e55b36..ce11e15 100644
--- a/src/twadmin/twadmincl.cpp
+++ b/src/twadmin/twadmincl.cpp
@@ -63,7 +63,7 @@
 #include "core/displayencoder.h"
 
 //Provide a swab() impl. from glibc, for platforms that don't have one
-#if defined(__SYLLABLE__) || defined(__ANDROID_API__)
+#if defined(__SYLLABLE__) || defined(__ANDROID_API__) || defined(_SORTIX_SOURCE)
 void swab (const void *bfrom, void *bto, ssize_t n)
 {
   const char *from = (const char *) bfrom;