diff --git a/gcc/testsuite/g++.dg/torture/pr115694.C b/gcc/testsuite/g++.dg/torture/pr115694.C
new file mode 100644
index 00000000000..bbce47decf8
--- /dev/null
+++ b/gcc/testsuite/g++.dg/torture/pr115694.C
@@ -0,0 +1,13 @@
+// { dg-do compile }
+
+_Complex a;
+typedef struct {
+  double a[2];
+} b;
+void c(b);
+void d()
+{
+  _Complex b1 = a;
+  b t = __builtin_bit_cast (b, b1);
+  c(t);
+}
diff --git a/gcc/tree-ssa-forwprop.cc b/gcc/tree-ssa-forwprop.cc
index 05d42ccd3c6..abf71f0d3a0 100644
--- a/gcc/tree-ssa-forwprop.cc
+++ b/gcc/tree-ssa-forwprop.cc
@@ -3762,6 +3762,8 @@ pass_forwprop::execute (function *fun)
 		  && gimple_store_p (use_stmt)
 		  && !gimple_has_volatile_ops (use_stmt)
 		  && is_gimple_assign (use_stmt)
+		  && (TREE_CODE (TREE_TYPE (gimple_assign_lhs (use_stmt)))
+		      == COMPLEX_TYPE)
 		  && (TREE_CODE (gimple_assign_lhs (use_stmt))
 		      != TARGET_MEM_REF))
 		{