diff --git a/artiq/compiler/transforms/llvm_ir_generator.py b/artiq/compiler/transforms/llvm_ir_generator.py
index 7bf6037f8..50ce33f61 100644
--- a/artiq/compiler/transforms/llvm_ir_generator.py
+++ b/artiq/compiler/transforms/llvm_ir_generator.py
@@ -1584,9 +1584,9 @@ class LLVMIRGenerator:
                                    insn.arguments(),
                                    llnormalblock, llunwindblock)
         elif types.is_external_function(functiontyp):
-            llfun, llargs, llarg_attrs = self._prepare_ffi_call(insn)
+            llfun, llargs, llarg_attrs, llcallstackptr = self._prepare_ffi_call(insn)
         else:
-            llfun, llargs, llarg_attrs = self._prepare_closure_call(insn)
+            llfun, llargs, llarg_attrs, llcallstackptr = self._prepare_closure_call(insn)
 
         if self.has_sret(functiontyp):
             llstackptr = self.llbuilder.call(self.llbuiltin("llvm.stacksave"), [])
@@ -1608,6 +1608,9 @@ class LLVMIRGenerator:
             # The !tbaa metadata is not legal to use with the invoke instruction,
             # so unlike process_Call, we do not set it here.
 
+        if llcallstackptr != None:
+            self.llbuilder.call(self.llbuiltin("llvm.stackrestore"), [llcallstackptr])
+
         return llresult
 
     def _quote_listish_to_llglobal(self, value, elt_type, path, kind_name):