diff --git a/libc/include/llvm-libc-types/off_t.h b/libc/include/llvm-libc-types/off_t.h
index 111b29aa68d87..a0cbe992189d0 100644
--- a/libc/include/llvm-libc-types/off_t.h
+++ b/libc/include/llvm-libc-types/off_t.h
@@ -9,6 +9,10 @@
 #ifndef __LLVM_LIBC_TYPES_OFF_T_H__
 #define __LLVM_LIBC_TYPES_OFF_T_H__
 
+#if defined(__LP64__) || defined(__riscv)
 typedef __INT64_TYPE__ off_t;
+#else
+typedef __INT32_TYPE__ off_t;
+#endif // __LP64__ || __riscv
 
 #endif // __LLVM_LIBC_TYPES_OFF_T_H__