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-rw-r--r--math/w_j1_template.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/math/w_j1_template.c b/math/w_j1_template.c
index 6d1058f7e0..47dcbcd381 100644
--- a/math/w_j1_template.c
+++ b/math/w_j1_template.c
@@ -21,6 +21,7 @@
    for each floating-point type.  */
 #if __USE_WRAPPER_TEMPLATE
 
+# include <errno.h>
 # include <fenv.h>
 # include <math.h>
 # include <math_private.h>