about summary refs log tree commit diff
path: root/editor/pnmshear.c
diff options
context:
space:
mode:
Diffstat (limited to 'editor/pnmshear.c')
-rw-r--r--editor/pnmshear.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/editor/pnmshear.c b/editor/pnmshear.c
index 99fa3026..1c330bb7 100644
--- a/editor/pnmshear.c
+++ b/editor/pnmshear.c
@@ -10,7 +10,7 @@
 ** implied warranty.
 */
 
-#define _XOPEN_SOURCE   /* get M_PI in math.h */
+#define _XOPEN_SOURCE 500  /* get M_PI in math.h */
 
 #include <assert.h>
 #include <math.h>