diff --git a/gcc/testsuite/gcc.dg/torture/pr105786.c b/gcc/testsuite/gcc.dg/torture/pr105786.c
new file mode 100644
index 0000000000000000000000000000000000000000..64aacf74b0a40ddd3fdcbe305ed65e97d0e2cb61
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/torture/pr105786.c
@@ -0,0 +1,13 @@
+/* { dg-do compile } */
+
+void sink(const char*);
+static const char *a;
+int main()
+{
+  const char *b = a;
+  for (int i = 0; i < 2; ++i)
+    while (*b++)
+      ;
+  sink(b);
+  return 0;
+}
diff --git a/gcc/tree-loop-distribution.cc b/gcc/tree-loop-distribution.cc
index db6e9096a8678acb24ada7fbd26d0c5af3bb7010..086b59ca2bee629eeb24e375f9466b539b6c7cf4 100644
--- a/gcc/tree-loop-distribution.cc
+++ b/gcc/tree-loop-distribution.cc
@@ -3658,6 +3658,7 @@ loop_distribution::transform_reduction_loop (loop_p loop)
   /* Handle strlen like loops.  */
   if (store_dr == NULL
       && integer_zerop (pattern)
+      && INTEGRAL_TYPE_P (TREE_TYPE (reduction_var))
       && TREE_CODE (reduction_iv.base) == INTEGER_CST
       && TREE_CODE (reduction_iv.step) == INTEGER_CST
       && integer_onep (reduction_iv.step))