diff --git a/thumbv7em-none-eabi.json b/thumbv7em-none-eabi.json
index b81bb8da..14ea9d31 100644
--- a/thumbv7em-none-eabi.json
+++ b/thumbv7em-none-eabi.json
@@ -1,7 +1,7 @@
 {
     "arch": "arm",
     "cpu": "cortex-m4",
-    "data-layout": "e-m:e-p:32:32-i1:8:32-i8:8:32-i16:16:32-i64:64-v128:64:128-a:0:32-n32-S64",
+    "data-layout": "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64",
     "disable-redzone": true,
     "executables": true,
     "llvm-target": "thumbv7em-none-eabi",
diff --git a/thumbv7m-none-eabi.json b/thumbv7m-none-eabi.json
index 36bbfa58..e57eec87 100644
--- a/thumbv7m-none-eabi.json
+++ b/thumbv7m-none-eabi.json
@@ -1,7 +1,7 @@
 {
     "arch": "arm",
     "cpu": "cortex-m3",
-    "data-layout": "e-m:e-p:32:32-i1:8:32-i8:8:32-i16:16:32-i64:64-v128:64:128-a:0:32-n32-S64",
+    "data-layout": "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64",
     "disable-redzone": true,
     "executables": true,
     "llvm-target": "thumbv7m-none-eabi",