diff --git a/src/stream/fs/ext2fs.c b/src/stream/fs/ext2fs.c
index e57a9f1915..f29fd8aeb1 100644
--- a/src/stream/fs/ext2fs.c
+++ b/src/stream/fs/ext2fs.c
@@ -239,7 +239,7 @@ struct ext2_dir_entry
  * ffz = Find First Zero in word. Undefined if no zero exists,
  * so code should check against ~0UL first..
  */
-#ifndef PPC
+#if ARCH == 'i386'
 static __inline__ unsigned long
 ffz (unsigned long word)
 {
diff --git a/src/stream/fs/fat.c b/src/stream/fs/fat.c
index aa64e584d6..540cac370e 100644
--- a/src/stream/fs/fat.c
+++ b/src/stream/fs/fat.c
@@ -54,7 +54,7 @@ struct fat_superblock
 
 #define FAT_CACHE_SIZE 2048
 
-#ifndef PPC
+#if ARCH == 'i386'
 static __inline__ unsigned long
 log2 (unsigned long word)
 {