diff --git a/compiler/optimizing/intrinsics_mips.cc b/compiler/optimizing/intrinsics_mips.cc
index 7c81588..9b5d7a0 100644
--- a/compiler/optimizing/intrinsics_mips.cc
+++ b/compiler/optimizing/intrinsics_mips.cc
@@ -2497,6 +2497,12 @@
 
 UNIMPLEMENTED_INTRINSIC(MIPS, StringStringIndexOf);
 UNIMPLEMENTED_INTRINSIC(MIPS, StringStringIndexOfAfter);
+UNIMPLEMENTED_INTRINSIC(MIPS, StringBufferAppend);
+UNIMPLEMENTED_INTRINSIC(MIPS, StringBufferLength);
+UNIMPLEMENTED_INTRINSIC(MIPS, StringBufferToString);
+UNIMPLEMENTED_INTRINSIC(MIPS, StringBuilderAppend);
+UNIMPLEMENTED_INTRINSIC(MIPS, StringBuilderLength);
+UNIMPLEMENTED_INTRINSIC(MIPS, StringBuilderToString);
 
 // 1.8.
 UNIMPLEMENTED_INTRINSIC(MIPS, UnsafeGetAndAddInt)