1 files changed, 2 insertions, 0 deletions
diff --git a/sysdeps/stub/e_log10l.c b/sysdeps/stub/e_log10l.c
index 0e8cdcaaa9..a414d04d74 100644
--- a/sysdeps/stub/e_log10l.c
+++ b/sysdeps/stub/e_log10l.c
@@ -1,10 +1,12 @@
 #include <math.h>
 #include <stdio.h>
+#include <errno.h>
 
 long double
 __ieee754_log10l (long double x)
 {
   fputs ("__ieee754_log10l not implemented\n", stderr);
+  __set_errno (ENOSYS);
   return 0.0;
 }