1 files changed, 2 insertions, 0 deletions
diff --git a/sysdeps/stub/e_lgammal_r.c b/sysdeps/stub/e_lgammal_r.c
index 015511818c..d7fbbca4df 100644
--- a/sysdeps/stub/e_lgammal_r.c
+++ b/sysdeps/stub/e_lgammal_r.c
@@ -1,10 +1,12 @@
 #include <math.h>
 #include <stdio.h>
+#include <errno.h>
 
 long double
 __ieee754_lgammal_r (long double x, int *signgamp)
 {
   fputs ("__ieee754_lgammal_r not implemented\n", stderr);
+  __set_errno (ENOSYS);
   return 0.0;
 }