diff --git a/arch/sparc64/ofmem_sparc64.c b/arch/sparc64/ofmem_sparc64.c
index ffcc2bd..ad8fe46 100644
--- a/arch/sparc64/ofmem_sparc64.c
+++ b/arch/sparc64/ofmem_sparc64.c
@@ -20,7 +20,7 @@
 
 #define OF_MALLOC_BASE		((char*)OFMEM + ALIGN_SIZE(sizeof(ofmem_t), 8))
 
-#define MEMSIZE ((128 + 256 + 512) * 1024)
+#define MEMSIZE ((128 + 512 + 512) * 1024)
 static union {
 	char memory[MEMSIZE];
 	ofmem_t ofmem;
diff --git a/arch/sparc64/openbios.c b/arch/sparc64/openbios.c
index 67849e1..bfe763d 100644
--- a/arch/sparc64/openbios.c
+++ b/arch/sparc64/openbios.c
@@ -33,7 +33,7 @@
 #define APB_MEM_BASE         0x1ff00000000ULL
 
 #define MEMORY_SIZE     (512*1024)      /* 512K ram for hosted system */
-#define DICTIONARY_SIZE (256*1024)      /* 256K for the dictionary   */
+#define DICTIONARY_SIZE (512*1024)      /* 512K for the dictionary   */
 
 static ucell *memory;