diff --git a/dlls/krnl386.exe16/global.c b/dlls/krnl386.exe16/global.c
index d9dcb1bd04d..699463c0e2c 100644
--- a/dlls/krnl386.exe16/global.c
+++ b/dlls/krnl386.exe16/global.c
@@ -963,9 +963,12 @@ WORD WINAPI GlobalHandleToSel16( HGLOBAL16 handle )
  */
 DWORD WINAPI GetFreeMemInfo16(void)
 {
+    SYSTEM_BASIC_INFORMATION info;
     MEMORYSTATUS status;
+
+    NtQuerySystemInformation( SystemBasicInformation, &info, sizeof(info), NULL );
     GlobalMemoryStatus( &status );
-    return MAKELONG( status.dwTotalVirtual/getpagesize(), status.dwAvailVirtual/getpagesize() );
+    return MAKELONG( status.dwTotalVirtual / info.PageSize, status.dwAvailVirtual / info.PageSize );
 }
 
 /***********************************************************************
diff --git a/dlls/krnl386.exe16/int31.c b/dlls/krnl386.exe16/int31.c
index ac9ae1f5815..5eddcca3cb7 100644
--- a/dlls/krnl386.exe16/int31.c
+++ b/dlls/krnl386.exe16/int31.c
@@ -1312,6 +1312,7 @@ void WINAPI DOSVM_Int31Handler( CONTEXT *context )
         TRACE("get free memory information\n");
         {
             MEMORYSTATUS status;
+            SYSTEM_BASIC_INFORMATION sbi;
 
             /* the layout is just the same as MEMMANINFO, but without
              * the dwSize entry.
@@ -1331,7 +1332,9 @@ void WINAPI DOSVM_Int31Handler( CONTEXT *context )
             } *info = CTX_SEG_OFF_TO_LIN( context, context->SegEs, context->Edi );
 
             GlobalMemoryStatus( &status );
-            info->wPageSize            = getpagesize();
+            NtQuerySystemInformation( SystemBasicInformation, &sbi, sizeof(sbi), NULL );
+
+            info->wPageSize            = sbi.PageSize;
             info->dwLargestFreeBlock   = status.dwAvailVirtual;
             info->dwMaxPagesAvailable  = info->dwLargestFreeBlock / info->wPageSize;
             info->dwMaxPagesLockable   = info->dwMaxPagesAvailable;
@@ -1418,11 +1421,14 @@ void WINAPI DOSVM_Int31Handler( CONTEXT *context )
         break;
 
     case 0x0604:  /* Get page size */
+    {
+        SYSTEM_BASIC_INFORMATION info;
         TRACE("get pagesize\n");
-        SET_BX( context, HIWORD(getpagesize()) );
-        SET_CX( context, LOWORD(getpagesize()) );
+        NtQuerySystemInformation( SystemBasicInformation, &info, sizeof(info), NULL );
+        SET_BX( context, HIWORD(info.PageSize) );
+        SET_CX( context, LOWORD(info.PageSize) );
         break;
-
+    }
     case 0x0700: /* Mark pages as paging candidates */
         TRACE( "mark pages as paging candidates - ignored (no paging)\n" );
         break;
diff --git a/dlls/toolhelp.dll16/toolhelp.c b/dlls/toolhelp.dll16/toolhelp.c
index fb001ea3dc4..4fa1500e5ec 100644
--- a/dlls/toolhelp.dll16/toolhelp.c
+++ b/dlls/toolhelp.dll16/toolhelp.c
@@ -491,6 +491,7 @@ BOOL16 WINAPI TaskFindHandle16( TASKENTRY *lpte, HTASK16 hTask )
  */
 BOOL16 WINAPI MemManInfo16( MEMMANINFO *info )
 {
+    SYSTEM_BASIC_INFORMATION sbi;
     MEMORYSTATUS status;
 
     /*
@@ -498,8 +499,9 @@ BOOL16 WINAPI MemManInfo16( MEMMANINFO *info )
      * _must_ provide the size in the dwSize field, this function
      * (under Windows) always fills the structure and returns true.
      */
+    NtQuerySystemInformation( SystemBasicInformation, &sbi, sizeof(sbi), NULL );
     GlobalMemoryStatus( &status );
-    info->wPageSize            = getpagesize();
+    info->wPageSize            = sbi.PageSize;
     info->dwLargestFreeBlock   = status.dwAvailVirtual;
     info->dwMaxPagesAvailable  = info->dwLargestFreeBlock / info->wPageSize;
     info->dwMaxPagesLockable   = info->dwMaxPagesAvailable;