diff --git a/target/linux/amcc/config-2.6.21 b/target/linux/amcc/config-2.6.21
index 716294559d..93bcefcb59 100644
--- a/target/linux/amcc/config-2.6.21
+++ b/target/linux/amcc/config-2.6.21
@@ -61,7 +61,7 @@ CONFIG_ISA_DMA_API=y
 CONFIG_KERNEL_START=0xc0000000
 CONFIG_LOWMEM_SIZE=0x30000000
 # CONFIG_LUAN is not set
-CONFIG_MATH_EMULATION=y
+# CONFIG_MATH_EMULATION is not set
 CONFIG_MTD=y
 # CONFIG_MTD_ABSENT is not set
 CONFIG_MTD_BLKDEVS=y
diff --git a/target/linux/ixp4xx/config-default b/target/linux/ixp4xx/config-default
index 0c2af9ca41..e669a61018 100644
--- a/target/linux/ixp4xx/config-default
+++ b/target/linux/ixp4xx/config-default
@@ -90,7 +90,7 @@ CONFIG_DNOTIFY=y
 # CONFIG_FARSYNC is not set
 CONFIG_FIRMWARE_EDID=y
 # CONFIG_FPE_FASTFPE is not set
-CONFIG_FPE_NWFPE=y
+# CONFIG_FPE_NWFPE is not set
 # CONFIG_FPE_NWFPE_XP is not set
 CONFIG_FRAME_POINTER=y
 # CONFIG_HAMRADIO is not set
diff --git a/target/linux/magicbox/config-2.6.22 b/target/linux/magicbox/config-2.6.22
index 87dcb7e245..32b33a9792 100644
--- a/target/linux/magicbox/config-2.6.22
+++ b/target/linux/magicbox/config-2.6.22
@@ -75,7 +75,7 @@ CONFIG_KERNEL_START=0xc0000000
 CONFIG_LOWMEM_SIZE=0x30000000
 # CONFIG_MACINTOSH_DRIVERS is not set
 CONFIG_MAGICBOX=y
-CONFIG_MATH_EMULATION=y
+# CONFIG_MATH_EMULATION is not set
 CONFIG_MINI_FO=y
 CONFIG_MTD=y
 # CONFIG_MTD_ABSENT is not set