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-rw-r--r--lib/libppmcolor.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/libppmcolor.c b/lib/libppmcolor.c
index aee8fd83..9a1ee5c1 100644
--- a/lib/libppmcolor.c
+++ b/lib/libppmcolor.c
@@ -9,6 +9,7 @@
 ** implied warranty.
 */
 
+#define _DEFAULT_SOURCE 1  /* New name for SVID & BSD source defines */
 #define _BSD_SOURCE 1      /* Make sure strdup() is in string.h */
 #define _XOPEN_SOURCE 500  /* Make sure strdup() is in string.h */