diff --git a/agb/.cargo/config.toml b/agb/.cargo/config.toml
index a6201b44..f56bbdda 100644
--- a/agb/.cargo/config.toml
+++ b/agb/.cargo/config.toml
@@ -6,5 +6,5 @@ build-std-features = ["compiler-builtins-mem"]
 target = "thumbv4t-none-eabi"
 
 [target.thumbv4t-none-eabi]
-rustflags = ["-Clink-arg=-Tgba.ld"]
+rustflags = ["-Clink-arg=-Tgba.ld", "-Ctarget-cpu=arm7tdmi"]
 runner = "mgba-test-runner"
diff --git a/agb/build.rs b/agb/build.rs
index 071b4389..9ad3c788 100644
--- a/agb/build.rs
+++ b/agb/build.rs
@@ -11,7 +11,7 @@ fn main() {
 
     let out = std::process::Command::new("arm-none-eabi-as")
         .arg("-mthumb-interwork")
-        .arg("-mthumb")
+        .arg("-mcpu=arm7tdmi")
         .arg("-g")
         .args(&["-o", out_file_path.as_str()])
         .arg("crt0.s")