diff --git a/target/linux/x86/alix2/target.mk b/target/linux/x86/alix2/target.mk
index ab1f2f63b8..bd20bca135 100644
--- a/target/linux/x86/alix2/target.mk
+++ b/target/linux/x86/alix2/target.mk
@@ -23,8 +23,8 @@ DEFAULT_PACKAGES += \
 
 CS5535_MASK:=0x0b000042
 
-CFLAGS += -Os -pipe -march=k6-2 -fno-align-functions -fno-align-loops -fno-align-jumps \
-	  -fno-align-labels
+CFLAGS += -march=geode -Os -mmmx -m3dnow -fno-align-jumps -fno-align-functions \
+	-fno-align-labels -fno-align-loops -pipe -fomit-frame-pointer
 
 define Target/Description
 	Build firmware images for PCEngines alix2 board
diff --git a/target/linux/x86/geos/target.mk b/target/linux/x86/geos/target.mk
index b7528237d5..2869bf70ad 100644
--- a/target/linux/x86/geos/target.mk
+++ b/target/linux/x86/geos/target.mk
@@ -25,8 +25,8 @@ DEFAULT_PACKAGES += \
 
 CS5535_MASK:=0x0E000048
 
-CFLAGS += -Os -pipe -march=k6-2 -fno-align-functions -fno-align-loops -fno-align-jumps \
-      -fno-align-labels
+CFLAGS += -march=geode -Os -mmmx -m3dnow -fno-align-jumps -fno-align-functions \
+        -fno-align-labels -fno-align-loops -pipe -fomit-frame-pointer
 
 define Target/Description
     Build firmware images for Traverse Geos board