diff --git a/compiler-rt/lib/asan/asan_malloc_linux.cpp b/compiler-rt/lib/asan/asan_malloc_linux.cpp
--- a/compiler-rt/lib/asan/asan_malloc_linux.cpp
+++ b/compiler-rt/lib/asan/asan_malloc_linux.cpp
@@ -115,7 +115,11 @@
 }
 #endif // SANITIZER_INTERCEPT_ALIGNED_ALLOC
 
+#if !SANITIZER_FREEBSD
 INTERCEPTOR(uptr, malloc_usable_size, void *ptr) {
+#else
+INTERCEPTOR(uptr, malloc_usable_size, const void *ptr) {
+#endif
   GET_CURRENT_PC_BP_SP;
   (void)sp;
   return asan_malloc_usable_size(ptr, pc, bp);
diff --git a/compiler-rt/lib/msan/msan_interceptors.cpp b/compiler-rt/lib/msan/msan_interceptors.cpp
--- a/compiler-rt/lib/msan/msan_interceptors.cpp
+++ b/compiler-rt/lib/msan/msan_interceptors.cpp
@@ -232,7 +232,11 @@
 #endif
 
 #if !SANITIZER_NETBSD
+#if !SANITIZER_FREEBSD
 INTERCEPTOR(uptr, malloc_usable_size, void *ptr) {
+#else
+INTERCEPTOR(uptr, malloc_usable_size, const void *ptr) {
+#endif
   return __sanitizer_get_allocated_size(ptr);
 }
 #define MSAN_MAYBE_INTERCEPT_MALLOC_USABLE_SIZE \