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-rw-r--r--generator/pamstereogram.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/generator/pamstereogram.c b/generator/pamstereogram.c
index 6bcababa..15cf1a2c 100644
--- a/generator/pamstereogram.c
+++ b/generator/pamstereogram.c
@@ -43,6 +43,7 @@
  * ----------------------------------------------------------------------
  */
 
+#define _ISOC99_SOURCE  /* Make sure strtof() is in <stdlib.h> */
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>