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-rw-r--r--libcrystfel/src/reflist-utils.c2
1 files changed, 0 insertions, 2 deletions
diff --git a/libcrystfel/src/reflist-utils.c b/libcrystfel/src/reflist-utils.c
index 4621f4f4..380a1b8a 100644
--- a/libcrystfel/src/reflist-utils.c
+++ b/libcrystfel/src/reflist-utils.c
@@ -27,8 +27,6 @@
*
*/
-#define _ISOC99_SOURCE
-#define _GNU_SOURCE
#include <math.h>
#include <stdio.h>
#include <assert.h>