diff --git a/src/librustc_back/target/arm_linux_androideabi.rs b/src/librustc_back/target/arm_linux_androideabi.rs
index e93a9a788a42b..ba21b1df032a8 100644
--- a/src/librustc_back/target/arm_linux_androideabi.rs
+++ b/src/librustc_back/target/arm_linux_androideabi.rs
@@ -14,7 +14,7 @@ use target::{Target, TargetOptions, TargetResult};
 pub fn target() -> TargetResult {
     let mut base = super::android_base::opts();
     // https://developer.android.com/ndk/guides/abis.html#armeabi
-    base.features = "+v5te".to_string();
+    base.features = "+strict-align,+v5te".to_string();
     base.max_atomic_width = Some(64);
 
     Ok(Target {
diff --git a/src/librustc_back/target/arm_unknown_linux_gnueabi.rs b/src/librustc_back/target/arm_unknown_linux_gnueabi.rs
index b9f40accaeb72..e630376a67dd0 100644
--- a/src/librustc_back/target/arm_unknown_linux_gnueabi.rs
+++ b/src/librustc_back/target/arm_unknown_linux_gnueabi.rs
@@ -27,7 +27,7 @@ pub fn target() -> TargetResult {
         linker_flavor: LinkerFlavor::Gcc,
 
         options: TargetOptions {
-            features: "+v6".to_string(),
+            features: "+strict-align,+v6".to_string(),
             abi_blacklist: super::arm_base::abi_blacklist(),
             .. base
         },
diff --git a/src/librustc_back/target/arm_unknown_linux_gnueabihf.rs b/src/librustc_back/target/arm_unknown_linux_gnueabihf.rs
index a3ea69caec646..178a948b2b9c8 100644
--- a/src/librustc_back/target/arm_unknown_linux_gnueabihf.rs
+++ b/src/librustc_back/target/arm_unknown_linux_gnueabihf.rs
@@ -27,7 +27,7 @@ pub fn target() -> TargetResult {
         linker_flavor: LinkerFlavor::Gcc,
 
         options: TargetOptions {
-            features: "+v6,+vfp2".to_string(),
+            features: "+strict-align,+v6,+vfp2".to_string(),
             abi_blacklist: super::arm_base::abi_blacklist(),
             .. base
         }
diff --git a/src/librustc_back/target/arm_unknown_linux_musleabi.rs b/src/librustc_back/target/arm_unknown_linux_musleabi.rs
index 598f722d9af7e..29720ec5efcd7 100644
--- a/src/librustc_back/target/arm_unknown_linux_musleabi.rs
+++ b/src/librustc_back/target/arm_unknown_linux_musleabi.rs
@@ -16,7 +16,7 @@ pub fn target() -> TargetResult {
 
     // Most of these settings are copied from the arm_unknown_linux_gnueabi
     // target.
-    base.features = "+v6".to_string();
+    base.features = "+strict-align,+v6".to_string();
     base.max_atomic_width = Some(64);
     Ok(Target {
         // It's important we use "gnueabi" and not "musleabi" here. LLVM uses it
diff --git a/src/librustc_back/target/arm_unknown_linux_musleabihf.rs b/src/librustc_back/target/arm_unknown_linux_musleabihf.rs
index ea0bf75b103c9..fc8313877f640 100644
--- a/src/librustc_back/target/arm_unknown_linux_musleabihf.rs
+++ b/src/librustc_back/target/arm_unknown_linux_musleabihf.rs
@@ -16,7 +16,7 @@ pub fn target() -> TargetResult {
 
     // Most of these settings are copied from the arm_unknown_linux_gnueabihf
     // target.
-    base.features = "+v6,+vfp2".to_string();
+    base.features = "+strict-align,+v6,+vfp2".to_string();
     base.max_atomic_width = Some(64);
     Ok(Target {
         // It's important we use "gnueabihf" and not "musleabihf" here. LLVM