diff --git a/src/base/allocator/partition_allocator/src/partition_alloc/aarch64_support.h b/src/base/allocator/partition_allocator/src/partition_alloc/aarch64_support.h
index 4d01be71a7..d2a190c885 100644
--- a/src/base/allocator/partition_allocator/src/partition_alloc/aarch64_support.h
+++ b/src/base/allocator/partition_allocator/src/partition_alloc/aarch64_support.h
@@ -10,7 +10,7 @@
 #include "partition_alloc/build_config.h"
 #include "partition_alloc/partition_alloc_buildflags.h"
 
-#if BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_LINUX)
+#if BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_LINUX) && !defined(__MUSL__)
 #define HAS_HW_CAPS
 #endif
 
diff --git a/src/base/allocator/partition_allocator/src/partition_alloc/page_allocator_internals_posix.cc b/src/base/allocator/partition_allocator/src/partition_alloc/page_allocator_internals_posix.cc
index 58d652f9d4..d99ddd5531 100644
--- a/src/base/allocator/partition_allocator/src/partition_alloc/page_allocator_internals_posix.cc
+++ b/src/base/allocator/partition_allocator/src/partition_alloc/page_allocator_internals_posix.cc
@@ -8,8 +8,9 @@
 #include "partition_alloc/page_allocator.h"
 #include "partition_alloc/partition_alloc_buildflags.h"
 
-#if PA_BUILDFLAG(HAS_MEMORY_TAGGING) || \
-    (defined(__ARM_FEATURE_BTI_DEFAULT) && (__ARM_FEATURE_BTI_DEFAULT == 1))
+#if PA_BUILDFLAG(HAS_MEMORY_TAGGING) ||                                        \
+    (defined(__ARM_FEATURE_BTI_DEFAULT) && (__ARM_FEATURE_BTI_DEFAULT == 1) && \
+     !defined(__MUSL__))
 struct __ifunc_arg_t;
 
 #include "partition_alloc/aarch64_support.h"