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-rw-r--r--editor/ppmcolormask.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/editor/ppmcolormask.c b/editor/ppmcolormask.c
index 31fbff2a..f3b18ce1 100644
--- a/editor/ppmcolormask.c
+++ b/editor/ppmcolormask.c
@@ -9,6 +9,7 @@
   Contributed to the public domain by its author.
 =========================================================================*/
 
+#define _DEFAULT_SOURCE /* New name for SVID & BSD source defines */
 #define _XOPEN_SOURCE 500  /* Make sure strdup() is in string.h */
 #define _BSD_SOURCE  /* Make sure strdup() is in <string.h> */
 #include <assert.h>