diff --git a/src/sis_driver.c b/src/sis_driver.c
index 51c9660..b1490d3 100644
--- a/src/sis_driver.c
+++ b/src/sis_driver.c
@@ -4166,7 +4166,7 @@ SISPreInit(ScrnInfoPtr pScrn, int flags)
 			      biossize = 0x8000;
 			      break;
 	     }
-#if XSERVER_LIBPCIACCESS
+#ifdef XSERVER_LIBPCIACCESS
 	     if(readpci) {
 		pSiS->PciInfo->rom_size = biossize;
 		pci_device_read_rom(pSiS->PciInfo, pSiS->BIOS);
diff --git a/src/sis_vga.c b/src/sis_vga.c
index 8b625d2..cf39d0c 100644
--- a/src/sis_vga.c
+++ b/src/sis_vga.c
@@ -1715,7 +1715,7 @@ SiSVGAMapMem(ScrnInfoPtr pScrn)
     if(pSiS->VGAMapPhys == 0) pSiS->VGAMapPhys = 0xA0000;
 
 #if XF86_VERSION_CURRENT >= XF86_VERSION_NUMERIC(4,3,0,0,0)
-#if XSERVER_LIBPCIACCESS
+#ifdef XSERVER_LIBPCIACCESS
     (void) pci_device_map_legacy(pSiS->PciInfo, pSiS->VGAMapPhys, pSiS->VGAMapSize,
                                  PCI_DEV_MAP_FLAG_WRITABLE, &pSiS->VGAMemBase);
 #else
@@ -1737,7 +1737,7 @@ SiSVGAUnmapMem(ScrnInfoPtr pScrn)
 
     if(pSiS->VGAMemBase == NULL) return;
 
-#if XSERVER_LIBPCIACCESS
+#ifdef XSERVER_LIBPCIACCESS
     (void) pci_device_unmap_legacy(pSiS->PciInfo, pSiS->VGAMemBase, pSiS->VGAMapSize);
 #else
     xf86UnMapVidMem(pScrn->scrnIndex, pSiS->VGAMemBase, pSiS->VGAMapSize);