diff --git a/patches/windows_arm64.diff b/patches/windows_arm64.diff
index ff883e82..514f6275 100644
--- a/patches/windows_arm64.diff
+++ b/patches/windows_arm64.diff
@@ -27,7 +27,7 @@ index 421e95c5..e7c38fa4 100644
 +# LLVM on Windows doesn't need --version-script export
 +# https://reviews.llvm.org/D63743
 +ifeq (, $(WINARM64_CLANG))
-+	MALLOC_LINK_FLAGS += $(EXPORT_KEY)tbbmalloc.def
++  MALLOC_LINK_FLAGS += $(EXPORT_KEY)tbbmalloc.def
 +endif
  $(MALLOC.DLL): tbbmalloc.def
  endif
diff --git a/src/tbb/build/Makefile.tbbmalloc b/src/tbb/build/Makefile.tbbmalloc
index e7c38fa4..0efafb80 100644
--- a/src/tbb/build/Makefile.tbbmalloc
+++ b/src/tbb/build/Makefile.tbbmalloc
@@ -77,7 +77,7 @@ tbbmalloc.def: $(MALLOC.DEF)
 # LLVM on Windows doesn't need --version-script export
 # https://reviews.llvm.org/D63743
 ifeq (, $(WINARM64_CLANG))
-	MALLOC_LINK_FLAGS += $(EXPORT_KEY)tbbmalloc.def
+  MALLOC_LINK_FLAGS += $(EXPORT_KEY)tbbmalloc.def
 endif
 $(MALLOC.DLL): tbbmalloc.def
 endif