diff --git a/compiler/optimizing/loop_optimization.cc b/compiler/optimizing/loop_optimization.cc
index 8eeff1f..cf7acb3 100644
--- a/compiler/optimizing/loop_optimization.cc
+++ b/compiler/optimizing/loop_optimization.cc
@@ -623,6 +623,12 @@
     }
     return true;
   } else if (instruction->IsArrayGet()) {
+    // Strings are different, with a different offset to the actual data
+    // and some compressed to save memory. For now, all cases are rejected
+    // to avoid the complexity.
+    if (instruction->AsArrayGet()->IsStringCharAt()) {
+      return false;
+    }
     // Accept a right-hand-side array base[index] for
     // (1) exact matching vector type,
     // (2) loop-invariant base,