diff --git a/cas/1.0/default/Android.bp b/cas/1.0/default/Android.bp
index 802dce125f..f9977ff7be 100644
--- a/cas/1.0/default/Android.bp
+++ b/cas/1.0/default/Android.bp
@@ -12,6 +12,8 @@ cc_defaults {
       "TypeConvert.cpp",
     ],
 
+    compile_multilib: "32",
+
     shared_libs: [
       "android.hardware.cas@1.0",
       "android.hardware.cas.native@1.0",
diff --git a/cas/1.1/default/Android.bp b/cas/1.1/default/Android.bp
index dc42a42473..66a1eb8804 100644
--- a/cas/1.1/default/Android.bp
+++ b/cas/1.1/default/Android.bp
@@ -12,6 +12,8 @@ cc_defaults {
       "TypeConvert.cpp",
     ],
 
+    compile_multilib: "32",
+
     shared_libs: [
       "android.hardware.cas@1.0",
       "android.hardware.cas@1.1",
diff --git a/cas/1.2/default/Android.bp b/cas/1.2/default/Android.bp
index 94d5b3d8c6..9e5314874f 100644
--- a/cas/1.2/default/Android.bp
+++ b/cas/1.2/default/Android.bp
@@ -12,6 +12,8 @@ cc_defaults {
       "TypeConvert.cpp",
     ],
 
+    compile_multilib: "32",
+
     shared_libs: [
       "android.hardware.cas@1.0",
       "android.hardware.cas@1.1",