diff --git a/libm/src/math_private.h b/libm/src/math_private.h
index 13bcd3a..5f6e088 100644
--- a/libm/src/math_private.h
+++ b/libm/src/math_private.h
@@ -254,6 +254,7 @@
 #define	__ieee754_ynf	ynf
 #define	__ieee754_remainderf remainderf
 #define	__ieee754_scalbf scalbf
+#define __ieee754_ldexpf ldexpf
 
 /* fdlibm kernel function */
 int	__ieee754_rem_pio2(double,double*);