2 files changed, 2 insertions, 0 deletions
diff --git a/src/glsl/ir_constant_folding.cpp b/src/glsl/ir_constant_folding.cpp
index 5d77093852..3e6934c9a7 100644
--- a/src/glsl/ir_constant_folding.cpp
+++ b/src/glsl/ir_constant_folding.cpp
@@ -117,6 +117,7 @@ ir_constant_folding_visitor::visit_enter(ir_call *ir)
 	    param_rval->replace_with(new_param);
 	 }
       }
+      sig_iter.next();
    }
 
    return visit_continue_with_parent;
diff --git a/src/glsl/ir_tree_grafting.cpp b/src/glsl/ir_tree_grafting.cpp
index 748dcecefc..9b569b8284 100644
--- a/src/glsl/ir_tree_grafting.cpp
+++ b/src/glsl/ir_tree_grafting.cpp
@@ -202,6 +202,7 @@ ir_tree_grafting_visitor::visit_enter(ir_call *ir)
 	 ir->replace_with(new_ir);
 	 return visit_stop;
       }
+      sig_iter.next();
    }
 
    return visit_continue;