diff --git a/configure b/configure
index 4f87e0a43b..f8dd4db6c5 100755
--- a/configure
+++ b/configure
@@ -3309,7 +3309,7 @@ case "$target_arch2" in
   ;;
   ppc)
     gdb_xml_files="power-core.xml power-fpu.xml power-altivec.xml power-spe.xml"
-    target_phys_bits=32
+    target_phys_bits=64
     target_nptl="yes"
     target_libs_softmmu="$fdt_libs"
   ;;
diff --git a/target-ppc/cpu.h b/target-ppc/cpu.h
index 8e5c85c28e..f36f375596 100644
--- a/target-ppc/cpu.h
+++ b/target-ppc/cpu.h
@@ -66,7 +66,7 @@
 #define TARGET_PAGE_BITS 12
 #endif /* defined(TARGET_PPCEMB) */
 
-#define TARGET_PHYS_ADDR_SPACE_BITS 32
+#define TARGET_PHYS_ADDR_SPACE_BITS 36
 #define TARGET_VIRT_ADDR_SPACE_BITS 32
 
 #endif /* defined (TARGET_PPC64) */