diff --git a/src/mem/catalyst_flash.c b/src/mem/catalyst_flash.c
index da9bfc249..bed0384af 100644
--- a/src/mem/catalyst_flash.c
+++ b/src/mem/catalyst_flash.c
@@ -177,16 +177,16 @@ catalyst_flash_add_mappings(flash_t *dev)
     mem_mapping_add(&dev->mapping, 0xe0000, 0x20000,
                     flash_read, flash_readw, flash_readl,
                     flash_write, flash_writew, flash_writel,
-                    dev->array, MEM_MAPPING_EXTERNAL | MEM_MAPPING_ROM | MEM_MAPPING_ROMCS, (void *) dev);
+                    dev->array, MEM_MAPPING_EXTERNAL | MEM_MAPPING_ROM | MEM_MAPPING_ROMCS | MEM_MAPPING_ROM_WS, (void *) dev);
 
     mem_mapping_add(&(dev->mapping_h[0]), 0xfffc0000, 0x20000,
                     flash_read, flash_readw, flash_readl,
                     flash_write, flash_writew, flash_writel,
-                    dev->array, MEM_MAPPING_EXTERNAL | MEM_MAPPING_ROM | MEM_MAPPING_ROMCS, (void *) dev);
+                    dev->array, MEM_MAPPING_EXTERNAL | MEM_MAPPING_ROM | MEM_MAPPING_ROMCS | MEM_MAPPING_ROM_WS, (void *) dev);
     mem_mapping_add(&(dev->mapping_h[1]), 0xfffe0000, 0x20000,
                     flash_read, flash_readw, flash_readl,
                     flash_write, flash_writew, flash_writel,
-                    dev->array, MEM_MAPPING_EXTERNAL | MEM_MAPPING_ROM | MEM_MAPPING_ROMCS, (void *) dev);
+                    dev->array, MEM_MAPPING_EXTERNAL | MEM_MAPPING_ROM | MEM_MAPPING_ROMCS | MEM_MAPPING_ROM_WS, (void *) dev);
 }
 
 static void
diff --git a/src/mem/intel_flash.c b/src/mem/intel_flash.c
index 50e8016ce..266bd7835 100644
--- a/src/mem/intel_flash.c
+++ b/src/mem/intel_flash.c
@@ -320,16 +320,16 @@ intel_flash_add_mappings(flash_t *dev)
             mem_mapping_add(&(dev->mapping[i]), base, 0x10000,
                             flash_read, flash_readw, flash_readl,
                             flash_write, flash_writew, flash_writel,
-                            dev->array + fbase, MEM_MAPPING_EXTERNAL | MEM_MAPPING_ROM | MEM_MAPPING_ROMCS, (void *) dev);
+                            dev->array + fbase, MEM_MAPPING_EXTERNAL | MEM_MAPPING_ROM | MEM_MAPPING_ROMCS | MEM_MAPPING_ROM_WS, (void *) dev);
         }
         mem_mapping_add(&(dev->mapping_h[i]), (base | 0xfff00000) - sub, 0x10000,
                         flash_read, flash_readw, flash_readl,
                         flash_write, flash_writew, flash_writel,
-                        dev->array + fbase, MEM_MAPPING_EXTERNAL | MEM_MAPPING_ROM | MEM_MAPPING_ROMCS, (void *) dev);
+                        dev->array + fbase, MEM_MAPPING_EXTERNAL | MEM_MAPPING_ROM | MEM_MAPPING_ROMCS | MEM_MAPPING_ROM_WS, (void *) dev);
         mem_mapping_add(&(dev->mapping_h[i + max]), (base | 0xfff00000), 0x10000,
                         flash_read, flash_readw, flash_readl,
                         flash_write, flash_writew, flash_writel,
-                        dev->array + fbase, MEM_MAPPING_EXTERNAL | MEM_MAPPING_ROM | MEM_MAPPING_ROMCS, (void *) dev);
+                        dev->array + fbase, MEM_MAPPING_EXTERNAL | MEM_MAPPING_ROM | MEM_MAPPING_ROMCS | MEM_MAPPING_ROM_WS, (void *) dev);
     }
 }
 
diff --git a/src/mem/sst_flash.c b/src/mem/sst_flash.c
index 024bcf6a5..656ed225b 100644
--- a/src/mem/sst_flash.c
+++ b/src/mem/sst_flash.c
@@ -485,18 +485,18 @@ sst_add_mappings(sst_t *dev)
             mem_mapping_add(&(dev->mapping[i]), base, 0x10000,
                             sst_read, sst_readw, sst_readl,
                             sst_write, NULL, NULL,
-                            dev->array + fbase, MEM_MAPPING_EXTERNAL | MEM_MAPPING_ROM | MEM_MAPPING_ROMCS, (void *) dev);
+                            dev->array + fbase, MEM_MAPPING_EXTERNAL | MEM_MAPPING_ROM | MEM_MAPPING_ROMCS | MEM_MAPPING_ROM_WS, (void *) dev);
         }
         if (is6117) {
             mem_mapping_add(&(dev->mapping_h[i]), (base | 0x3f00000), 0x10000,
                             sst_read, sst_readw, sst_readl,
                             sst_write, NULL, NULL,
-                            dev->array + fbase, MEM_MAPPING_EXTERNAL | MEM_MAPPING_ROM | MEM_MAPPING_ROMCS, (void *) dev);
+                            dev->array + fbase, MEM_MAPPING_EXTERNAL | MEM_MAPPING_ROM | MEM_MAPPING_ROMCS | MEM_MAPPING_ROM_WS, (void *) dev);
         } else {
             mem_mapping_add(&(dev->mapping_h[i]), (base | (cpu_16bitbus ? 0xf00000 : 0xfff00000)), 0x10000,
                             sst_read, sst_readw, sst_readl,
                             sst_write, NULL, NULL,
-                            dev->array + fbase, MEM_MAPPING_EXTERNAL | MEM_MAPPING_ROM | MEM_MAPPING_ROMCS, (void *) dev);
+                            dev->array + fbase, MEM_MAPPING_EXTERNAL | MEM_MAPPING_ROM | MEM_MAPPING_ROMCS | MEM_MAPPING_ROM_WS, (void *) dev);
         }
     }
 }