diff --git a/src/osgPlugins/flt/AttrData.h b/src/osgPlugins/flt/AttrData.h
index 3ffef7c46..60387f629 100644
--- a/src/osgPlugins/flt/AttrData.h
+++ b/src/osgPlugins/flt/AttrData.h
@@ -26,7 +26,7 @@
 
 namespace flt {
 
- typedef signed long     int32;
+ typedef signed int     int32;	
 
  class AttrData : public osg::Object { 
   public:
diff --git a/src/osgPlugins/flt/LocalVertexPoolRecord.cpp b/src/osgPlugins/flt/LocalVertexPoolRecord.cpp
index b8c508331..8342197c1 100644
--- a/src/osgPlugins/flt/LocalVertexPoolRecord.cpp
+++ b/src/osgPlugins/flt/LocalVertexPoolRecord.cpp
@@ -369,7 +369,7 @@ void LocalVertexPoolRecord::endian()
   // If equal, vertex pool record was not continued.
   // If 16bit record length is less than length of vertex pool, then the original vertex
   //   pool record was continued with one or more CONTINUATION_OP records.
-  assert ( pool->RecHeader._wLength <= ( ( (uint32) vertex ) - ( (uint32) pool ) ) );
+  assert ( pool->RecHeader._wLength <= ( ( (unsigned long) vertex ) - ( (unsigned long) pool ) ) );
 }
 
 
diff --git a/src/osgPlugins/flt/ReaderWriterATTR.cpp b/src/osgPlugins/flt/ReaderWriterATTR.cpp
index 8efd26f52..c4dbf09de 100644
--- a/src/osgPlugins/flt/ReaderWriterATTR.cpp
+++ b/src/osgPlugins/flt/ReaderWriterATTR.cpp
@@ -49,8 +49,8 @@ typedef signed char     int8;
 typedef unsigned char   uint8;
 typedef signed short    int16;
 typedef unsigned short  uint16;
-typedef signed long     int32;
-typedef unsigned long   uint32;
+typedef signed int	int32;
+typedef unsigned int    uint32;
 typedef float           float32;
 typedef double          float64;
 
@@ -75,20 +75,20 @@ static void endian2(void* pSrc, int nSrc, void* pDst)
     }
     else if (nSrc == 4)
     {
-        long tmp1;
-        tmp1 = *(long *)pSrc;
+        uint32 tmp1;
+        tmp1 = *(uint32 *)pSrc;
         tmp1 = (tmp1 << 24) | ((tmp1 << 8) & 0xff0000) | ((tmp1 >> 8) & 0xff00) | ((tmp1 >> 24) & 0xff);
-        *(long *)pDst = tmp1;
+        *(uint32 *)pDst = tmp1;
     }
     else if (nSrc == 8)
     {
-        long tmp1, tmp2;
-        tmp1 = *(long *)pSrc;
-        tmp2 = *(1 + (long *)pSrc);
+        uint32 tmp1, tmp2;
+        tmp1 = *(uint32 *)pSrc;
+        tmp2 = *(1 + (uint32 *)pSrc);
         tmp1 = (tmp1 << 24) | ((tmp1 << 8) & 0xff0000) | ((tmp1 >> 8) & 0xff00) | ((tmp1 >> 24) & 0xff);
         tmp2 = (tmp2 << 24) | ((tmp2 << 8) & 0xff0000) | ((tmp2 >> 8) & 0xff00) | ((tmp2 >> 24) & 0xff);
-        *(long *)pDst = tmp2;
-        *(1 + (long *)pDst) = tmp1;
+        *(uint32 *)pDst = tmp2;
+        *(1 + (uint32 *)pDst) = tmp1;
     }
 }
 
diff --git a/src/osgPlugins/flt/flt.cpp b/src/osgPlugins/flt/flt.cpp
index d200792be..06f2380d6 100644
--- a/src/osgPlugins/flt/flt.cpp
+++ b/src/osgPlugins/flt/flt.cpp
@@ -25,20 +25,20 @@ void flt::endian2(void* pSrc, int nSrc, void* pDst, int )
     }
     else if (nSrc == 4)
     {
-        long tmp1;
-        tmp1 = *(long *)pSrc;
+        uint32 tmp1;
+        tmp1 = *(uint32 *)pSrc;
         tmp1 = (tmp1 << 24) | ((tmp1 << 8) & 0xff0000) | ((tmp1 >> 8) & 0xff00) | ((tmp1 >> 24) & 0xff);
-        *(long *)pDst = tmp1;
+        *(uint32 *)pDst = tmp1;
     }
     else if (nSrc == 8)
     {
-        long tmp1, tmp2;
-        tmp1 = *(long *)pSrc;
-        tmp2 = *(1 + (long *)pSrc);
+        uint32 tmp1, tmp2;
+        tmp1 = *(uint32 *)pSrc;
+        tmp2 = *(1 + (uint32 *)pSrc);
         tmp1 = (tmp1 << 24) | ((tmp1 << 8) & 0xff0000) | ((tmp1 >> 8) & 0xff00) | ((tmp1 >> 24) & 0xff);
         tmp2 = (tmp2 << 24) | ((tmp2 << 8) & 0xff0000) | ((tmp2 >> 8) & 0xff00) | ((tmp2 >> 24) & 0xff);
-        *(long *)pDst = tmp2;
-        *(1 + (long *)pDst) = tmp1;
+        *(uint32 *)pDst = tmp2;
+        *(1 + (uint32 *)pDst) = tmp1;
     }
 }
 
diff --git a/src/osgPlugins/flt/flt.h b/src/osgPlugins/flt/flt.h
index f929bc377..30ce7f6ae 100644
--- a/src/osgPlugins/flt/flt.h
+++ b/src/osgPlugins/flt/flt.h
@@ -65,8 +65,8 @@ typedef signed char     int8;
 typedef unsigned char   uint8;
 typedef signed short    int16;
 typedef unsigned short  uint16;
-typedef signed long     int32;
-typedef unsigned long   uint32;
+typedef signed int     	int32;	
+typedef unsigned int   	uint32;	
 typedef float           float32;
 typedef double          float64;