diff --git a/platform/wismote/Makefile.wismote b/platform/wismote/Makefile.wismote
index cb5e620b8..a0efa14df 100644
--- a/platform/wismote/Makefile.wismote
+++ b/platform/wismote/Makefile.wismote
@@ -23,7 +23,7 @@ CFLAGS += -DWITH_UIP6=1
 endif
 
 ifdef IAR
-CFLAGS += -D__MSP430F5437__=1 -e --vla -Ohz --multiplier=32 --multiplier_location=4C0 --hw_workaround=CPU40 --core=430X  --data_model small --double=32
+CFLAGS += -D__MSP430F5437__=1 -e --vla -Ohz --multiplier=32 --multiplier_location=4C0 --hw_workaround=CPU40 --core=430X --double=32
 else
 SMALL=1
 endif
diff --git a/platform/z1/Makefile.common b/platform/z1/Makefile.common
index 7164452e1..a3fa86c70 100644
--- a/platform/z1/Makefile.common
+++ b/platform/z1/Makefile.common
@@ -7,7 +7,7 @@ CFLAGS+=-Os -g
 endif
 
 ifdef IAR
-CFLAGS+=-e --vla -Ohz --multiplier=16s --core=430X  --data_model small --double=32
+CFLAGS+=-e --vla -Ohz --multiplier=16s --core=430X --double=32
 endif
 
 CLEAN += symbols.c symbols.h