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-rw-r--r--libc/string/generic/pagecopy.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/libc/string/generic/pagecopy.h b/libc/string/generic/pagecopy.h
index 5a0ada1fa..b00db493b 100644
--- a/libc/string/generic/pagecopy.h
+++ b/libc/string/generic/pagecopy.h
@@ -40,7 +40,7 @@
*/
-#if PAGE_COPY_THRESHOLD
+#if defined PAGE_COPY_THRESHOLD && PAGE_COPY_THRESHOLD
#include <assert.h>
@@ -48,7 +48,7 @@
do \
{ \
if ((nbytes) >= PAGE_COPY_THRESHOLD && \
- PAGE_OFFSET ((dstp) - (srcp)) == 0) \
+ PAGE_OFFSET ((dstp) - (srcp)) == 0) \
{ \
/* The amount to copy is past the threshold for copying \
pages virtually with kernel VM operations, and the \