diff --git a/dtool/src/dtoolbase/dtoolbase_cc.h b/dtool/src/dtoolbase/dtoolbase_cc.h
index 98bf992cf9..fc47f057d1 100644
--- a/dtool/src/dtoolbase/dtoolbase_cc.h
+++ b/dtool/src/dtoolbase/dtoolbase_cc.h
@@ -83,21 +83,6 @@ using namespace std;
 
 #define TYPENAME typename
 
-#ifndef HAVE_WCHAR_T
-// Some C++ libraries (os x 3.1) don't define this.
-typedef unsigned short wchar_t;
-#endif
-
-#ifndef HAVE_WSTRING
-// Some C++ libraries (gcc 2.95) don't define this.
-typedef basic_string<wchar_t> wstring;
-#endif
-
-#ifndef HAVE_STREAMSIZE
-// Some C++ libraries (Irix) don't define this.
-typedef long streamsize;
-#endif
-
 #ifndef HAVE_IOS_TYPEDEFS
 typedef int ios_openmode;
 typedef int ios_fmtflags;
diff --git a/dtool/src/dtoolutil/lineStreamBuf.cxx b/dtool/src/dtoolutil/lineStreamBuf.cxx
index f2a795dab5..561772ddcb 100644
--- a/dtool/src/dtoolutil/lineStreamBuf.cxx
+++ b/dtool/src/dtoolutil/lineStreamBuf.cxx
@@ -13,11 +13,6 @@
 
 #include "lineStreamBuf.h"
 
-#ifndef HAVE_STREAMSIZE
-// Some compilers--notably SGI--don't define this for us.
-typedef int streamsize;
-#endif
-
 /**
  *
  */
diff --git a/dtool/src/prc/encryptStreamBuf.cxx b/dtool/src/prc/encryptStreamBuf.cxx
index dc38ac5894..a939235743 100644
--- a/dtool/src/prc/encryptStreamBuf.cxx
+++ b/dtool/src/prc/encryptStreamBuf.cxx
@@ -23,11 +23,6 @@
 #include "openssl/rand.h"
 #include "openssl/evp.h"
 
-#ifndef HAVE_STREAMSIZE
-// Some compilers (notably SGI) don't define this for us
-typedef int streamsize;
-#endif /* HAVE_STREAMSIZE */
-
 // The iteration count is scaled by this factor for writing to the stream.
 static const int iteration_count_factor = 1000;
 
diff --git a/makepanda/makepanda.py b/makepanda/makepanda.py
index 80b551c84f..67ca6e4a13 100755
--- a/makepanda/makepanda.py
+++ b/makepanda/makepanda.py
@@ -2278,8 +2278,6 @@ DTOOL_CONFIG=[
     ("DEFAULT_PATHSEP",                '";"',                    '":"'),
     ("WORDS_BIGENDIAN",                'UNDEF',                  'UNDEF'),
     ("PHAVE_LOCKF",                    '1',                      '1'),
-    ("HAVE_WCHAR_T",                   '1',                      '1'),
-    ("HAVE_WSTRING",                   '1',                      '1'),
     ("SIMPLE_STRUCT_POINTERS",         '1',                      'UNDEF'),
     ("HAVE_DINKUM",                    'UNDEF',                  'UNDEF'),
     ("HAVE_STL_HASH",                  'UNDEF',                  'UNDEF'),
@@ -2289,7 +2287,6 @@ DTOOL_CONFIG=[
     ("PHAVE_GETOPT_H",                 'UNDEF',                  '1'),
     ("PHAVE_LINUX_INPUT_H",            'UNDEF',                  '1'),
     ("IOCTL_TERMINAL_WIDTH",           'UNDEF',                  '1'),
-    ("HAVE_STREAMSIZE",                '1',                      '1'),
     ("HAVE_IOS_TYPEDEFS",              '1',                      '1'),
     ("HAVE_IOS_BINARY",                '1',                      '1'),
     ("STATIC_INIT_GETENV",             '1',                      'UNDEF'),
diff --git a/panda/src/downloader/bioStreamBuf.cxx b/panda/src/downloader/bioStreamBuf.cxx
index d0bd04e027..65dd28c5ba 100644
--- a/panda/src/downloader/bioStreamBuf.cxx
+++ b/panda/src/downloader/bioStreamBuf.cxx
@@ -24,11 +24,6 @@
   #undef X509_NAME
 #endif  // WIN32_VC
 
-#ifndef HAVE_STREAMSIZE
-// Some compilers (notably SGI) don't define this for us
-typedef int streamsize;
-#endif /* HAVE_STREAMSIZE */
-
 /**
  *
  */
diff --git a/panda/src/downloader/chunkedStreamBuf.cxx b/panda/src/downloader/chunkedStreamBuf.cxx
index 9464a9c730..a20b8425ed 100644
--- a/panda/src/downloader/chunkedStreamBuf.cxx
+++ b/panda/src/downloader/chunkedStreamBuf.cxx
@@ -18,11 +18,6 @@
 // This module is not compiled if OpenSSL is not available.
 #ifdef HAVE_OPENSSL
 
-#ifndef HAVE_STREAMSIZE
-// Some compilers (notably SGI) don't define this for us
-typedef int streamsize;
-#endif /* HAVE_STREAMSIZE */
-
 /**
  *
  */
diff --git a/panda/src/downloader/identityStreamBuf.cxx b/panda/src/downloader/identityStreamBuf.cxx
index a11f1cfda3..4d98540423 100644
--- a/panda/src/downloader/identityStreamBuf.cxx
+++ b/panda/src/downloader/identityStreamBuf.cxx
@@ -17,11 +17,6 @@
 #ifdef HAVE_OPENSSL
 #include "httpChannel.h"
 
-#ifndef HAVE_STREAMSIZE
-// Some compilers (notably SGI) don't define this for us
-typedef int streamsize;
-#endif /* HAVE_STREAMSIZE */
-
 /**
  *
  */
diff --git a/panda/src/downloader/multiplexStreamBuf.cxx b/panda/src/downloader/multiplexStreamBuf.cxx
index 783558f587..8d290a2d6d 100644
--- a/panda/src/downloader/multiplexStreamBuf.cxx
+++ b/panda/src/downloader/multiplexStreamBuf.cxx
@@ -24,11 +24,6 @@
 // recursion.
 #include <assert.h>
 
-#ifndef HAVE_STREAMSIZE
-// Some compilers--notably SGI--don't define this for us.
-typedef int streamsize;
-#endif
-
 /**
  * Closes or deletes the relevant pointers, if _owns_obj is true.
  */
diff --git a/panda/src/express/subStreamBuf.cxx b/panda/src/express/subStreamBuf.cxx
index 61a349b215..22d3515767 100644
--- a/panda/src/express/subStreamBuf.cxx
+++ b/panda/src/express/subStreamBuf.cxx
@@ -15,11 +15,6 @@
 #include "pnotify.h"
 #include "memoryHook.h"
 
-#ifndef HAVE_STREAMSIZE
-// Some compilers (notably SGI) don't define this for us
-typedef int streamsize;
-#endif /* HAVE_STREAMSIZE */
-
 static const size_t substream_buffer_size = 4096;
 
 /**
diff --git a/pandatool/src/progbase/wordWrapStreamBuf.cxx b/pandatool/src/progbase/wordWrapStreamBuf.cxx
index 4280a3d394..f8f4dced30 100644
--- a/pandatool/src/progbase/wordWrapStreamBuf.cxx
+++ b/pandatool/src/progbase/wordWrapStreamBuf.cxx
@@ -17,11 +17,6 @@
 
 #include "pnotify.h"
 
-#ifndef HAVE_STREAMSIZE
-// Some compilers--notably SGI--don't define this for us.
-typedef int streamsize;
-#endif
-
 /**
  *
  */