--- a/flang/runtime/Float128Math/complex-math.h
+++ b/flang/runtime/Float128Math/complex-math.h
@@ -34,6 +34,23 @@
 #elif LDBL_MANT_DIG == 113
 /* Use 'long double' versions of libm functions. */
 #include <complex.h>
+#if defined(__ANDROID__) && __ANDROID_API__ < 26
+long double complex cacosl (long double complex);
+long double complex cacoshl(long double complex);
+long double complex casinl (long double complex);
+long double complex casinhl(long double complex);
+long double complex catanl (long double complex);
+long double complex catanhl(long double complex);
+long double complex ccosl  (long double complex);
+long double complex ccoshl (long double complex);
+long double complex cexpl  (long double complex);
+long double complex clogl  (long double complex);
+long double complex cpowl  (long double complex, long double complex);
+long double complex csinl  (long double complex);
+long double complex csinhl (long double complex);
+long double complex ctanl  (long double complex);
+long double complex ctanhl (long double complex);
+#endif
 
 #define CAbs(x) cabsl(x)
 #define CAcos(x) cacosl(x)