diff --git a/configure b/configure
index 944ff6bd2a3..ce49aed1f81 100755
--- a/configure
+++ b/configure
@@ -6809,6 +6809,7 @@ for ac_header in \
 	sys/statvfs.h \
 	sys/strtio.h \
 	sys/syscall.h \
+	sys/sysinfo.h \
 	sys/tihdr.h \
 	sys/time.h \
 	sys/timeout.h \
diff --git a/configure.ac b/configure.ac
index 6e960a1fbef..019d549f13e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -494,6 +494,7 @@ AC_CHECK_HEADERS(\
 	sys/statvfs.h \
 	sys/strtio.h \
 	sys/syscall.h \
+	sys/sysinfo.h \
 	sys/tihdr.h \
 	sys/time.h \
 	sys/timeout.h \
diff --git a/dlls/ntdll/virtual.c b/dlls/ntdll/virtual.c
index 5c43d26d4eb..2e63b786d2e 100644
--- a/dlls/ntdll/virtual.c
+++ b/dlls/ntdll/virtual.c
@@ -38,6 +38,9 @@
 #ifdef HAVE_SYS_MMAN_H
 # include <sys/mman.h>
 #endif
+#ifdef HAVE_SYS_SYSINFO_H
+# include <sys/sysinfo.h>
+#endif
 #ifdef HAVE_VALGRIND_VALGRIND_H
 # include <valgrind/valgrind.h>
 #endif
@@ -1356,11 +1359,22 @@ void virtual_init_threading(void)
  */
 void virtual_get_system_info( SYSTEM_BASIC_INFORMATION *info )
 {
+#ifdef HAVE_SYS_SYSINFO_H
+    struct sysinfo sinfo;
+#endif
+
     info->unknown                 = 0;
     info->KeMaximumIncrement      = 0;  /* FIXME */
     info->PageSize                = page_size;
     info->MmLowestPhysicalPage    = 1;
     info->MmHighestPhysicalPage   = 0x7fffffff / page_size;
+#ifdef HAVE_SYS_SYSINFO_H
+    if (!sysinfo(&sinfo))
+    {
+        ULONG64 total = (ULONG64)sinfo.totalram * sinfo.mem_unit;
+        info->MmHighestPhysicalPage = max(1, total / page_size);
+    }
+#endif
     info->MmNumberOfPhysicalPages = info->MmHighestPhysicalPage - info->MmLowestPhysicalPage;
     info->AllocationGranularity   = get_mask(0) + 1;
     info->LowestUserAddress       = (void *)0x10000;
diff --git a/include/config.h.in b/include/config.h.in
index a4a4bb42d8c..64f56fdb2c1 100644
--- a/include/config.h.in
+++ b/include/config.h.in
@@ -1119,6 +1119,9 @@
 /* Define to 1 if you have the <sys/sysctl.h> header file. */
 #undef HAVE_SYS_SYSCTL_H
 
+/* Define to 1 if you have the <sys/sysinfo.h> header file. */
+#undef HAVE_SYS_SYSINFO_H
+
 /* Define to 1 if you have the <sys/thr.h> header file. */
 #undef HAVE_SYS_THR_H