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-rw-r--r--math/tgmath.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/math/tgmath.h b/math/tgmath.h
index 307a124..b95d55b 100644
--- a/math/tgmath.h
+++ b/math/tgmath.h
@@ -283,7 +283,9 @@
#define remainder(Val1, Val2) __TGMATH_BINARY_REAL_ONLY (Val1, Val2, remainder)
/* Return X times (2 to the Nth power). */
+#if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
#define scalb(Val1, Val2) __TGMATH_BINARY_REAL_ONLY (Val1, Val2, scalb)
+#endif
/* Return X times (2 to the Nth power). */
#define scalbn(Val1, Val2) __TGMATH_BINARY_FIRST_REAL_ONLY (Val1, Val2, scalbn)