diff --git a/build/BUILD.zlib b/build/BUILD.zlib
index 65b292eb76e..d14f2e721ec 100644
--- a/build/BUILD.zlib
+++ b/build/BUILD.zlib
@@ -92,6 +92,7 @@ cc_library(
     local_defines = ["ZLIB_IMPLEMENTATION"] + select({
         "@platforms//cpu:x86_64": ["ADLER32_SIMD_SSSE3"],
         "@platforms//cpu:aarch64": ["ADLER32_SIMD_NEON"],
+        "//conditions:default": [],
     }) + select({
         ":x86_linux": ["X86_NOT_WINDOWS"],
         ":x86_macos": ["X86_NOT_WINDOWS"],
@@ -149,6 +150,7 @@ cc_library(
         "@platforms//cpu:aarch64": [
             "INFLATE_CHUNK_SIMD_NEON",
         ],
+        "//conditions:default": [],
     }),
     deps = [":zlib_common_headers"],
 )
@@ -185,6 +187,7 @@ cc_library(
     local_defines = ["ZLIB_IMPLEMENTATION"] + select({
         "@platforms//cpu:x86_64": ["DEFLATE_SLIDE_HASH_SSE2"],
         "@platforms//cpu:aarch64": ["DEFLATE_SLIDE_HASH_NEON"],
+        "//conditions:default": [],
     }),
     deps = [":zlib_common_headers"],
 )
@@ -242,6 +245,7 @@ cc_library(
             "CRC32_ARMV8_CRC32",
             "DEFLATE_SLIDE_HASH_NEON",
         ],
+        "//conditions:default": [],
     }) + select({
         ":x86_linux": ["X86_NOT_WINDOWS"],
         ":x86_macos": ["X86_NOT_WINDOWS"],
@@ -259,6 +263,7 @@ cc_library(
     ] + select({
         "@platforms//cpu:x86_64": [":zlib_crc32_simd"],
         "@platforms//cpu:aarch64": [":zlib_arm_crc32"],
+        "//conditions:default": [],
     }),
 )