diff --git a/libopenfpga/libopenfpgautil/src/openfpga_reserved_words.h b/libopenfpga/libopenfpgautil/src/openfpga_reserved_words.h
index 2f9bae817..732247178 100644
--- a/libopenfpga/libopenfpgautil/src/openfpga_reserved_words.h
+++ b/libopenfpga/libopenfpgautil/src/openfpga_reserved_words.h
@@ -59,6 +59,9 @@ constexpr char* DEFAULT_LB_DIR_NAME = "lb/";
 constexpr char* DEFAULT_RR_DIR_NAME = "routing/";
 constexpr char* DEFAULT_SUBMODULE_DIR_NAME = "sub_module/";
 
+constexpr char* VPR_BENCHMARK_OUT_PORT_PREFIX = "out:";
+constexpr char* OPENFPGA_BENCHMARK_OUT_PORT_PREFIX = "out_";
+
 } /* end namespace openfpga */
 
 #endif
diff --git a/openfpga/src/base/openfpga_bitstream.cpp b/openfpga/src/base/openfpga_bitstream.cpp
index 78e0cbddd..b978b200d 100644
--- a/openfpga/src/base/openfpga_bitstream.cpp
+++ b/openfpga/src/base/openfpga_bitstream.cpp
@@ -10,6 +10,7 @@
 
 /* Headers from openfpgautil library */
 #include "openfpga_digest.h"
+#include "openfpga_reserved_words.h"
 
 /* Headers from fpgabitstream library */
 #include "read_xml_arch_bitstream.h"
@@ -153,6 +154,11 @@ int write_io_mapping(const OpenfpgaContext& openfpga_ctx,
   ModuleId top_module = openfpga_ctx.module_graph().find_module(top_module_name);
   VTR_ASSERT(true == openfpga_ctx.module_graph().valid_module_id(top_module));
 
+  /* VPR added a prefix to the output ports, remove them here */
+  std::vector<std::string> prefix_to_remove;
+  prefix_to_remove.push_back(std::string(VPR_BENCHMARK_OUT_PORT_PREFIX));
+  prefix_to_remove.push_back(std::string(OPENFPGA_BENCHMARK_OUT_PORT_PREFIX));
+
   IoMap io_map = build_fpga_io_mapping_info(openfpga_ctx.module_graph(),
                                             top_module,
                                             g_vpr_ctx.atom(),
@@ -160,7 +166,8 @@ int write_io_mapping(const OpenfpgaContext& openfpga_ctx,
                                             openfpga_ctx.io_location_map(),
                                             openfpga_ctx.vpr_netlist_annotation(),
                                             std::string(),
-                                            std::string());
+                                            std::string(),
+                                            prefix_to_remove);
 
   status = write_io_mapping_to_xml_file(io_map,
                                         cmd_context.option_value(cmd, opt_file),
diff --git a/openfpga/src/fpga_bitstream/build_io_mapping_info.cpp b/openfpga/src/fpga_bitstream/build_io_mapping_info.cpp
index 76fbda9a2..3eb10fe37 100644
--- a/openfpga/src/fpga_bitstream/build_io_mapping_info.cpp
+++ b/openfpga/src/fpga_bitstream/build_io_mapping_info.cpp
@@ -37,7 +37,8 @@ IoMap build_fpga_io_mapping_info(const ModuleManager& module_manager,
                                  const IoLocationMap& io_location_map,
                                  const VprNetlistAnnotation& netlist_annotation,
                                  const std::string& io_input_port_name_postfix,
-                                 const std::string& io_output_port_name_postfix) {
+                                 const std::string& io_output_port_name_postfix,
+                                 const std::vector<std::string>& output_port_prefix_to_remove) {
   IoMap io_map;
 
   /* Only mappable i/o ports can be considered */
@@ -129,7 +130,18 @@ IoMap build_fpga_io_mapping_info(const ModuleManager& module_manager,
       benchmark_io_port.set_width(1);
     } else {
       VTR_ASSERT(AtomBlockType::OUTPAD == atom_ctx.nlist.block_type(atom_blk));
-      benchmark_io_port.set_name(std::string(block_name + io_output_port_name_postfix)); 
+      /* VPR may have added a prefix to the output ports, remove them here */
+      std::string output_block_name = block_name;
+      for (const std::string& prefix_to_remove : output_port_prefix_to_remove) {
+        if (!prefix_to_remove.empty()) {
+          if (0 == output_block_name.find(prefix_to_remove)) {
+            output_block_name.erase(0, prefix_to_remove.length());
+            break;
+          }
+        }
+      }
+
+      benchmark_io_port.set_name(std::string(output_block_name + io_output_port_name_postfix)); 
       benchmark_io_port.set_width(1);
     }
 
diff --git a/openfpga/src/fpga_bitstream/build_io_mapping_info.h b/openfpga/src/fpga_bitstream/build_io_mapping_info.h
index 615fafdd8..01f4b1d61 100644
--- a/openfpga/src/fpga_bitstream/build_io_mapping_info.h
+++ b/openfpga/src/fpga_bitstream/build_io_mapping_info.h
@@ -26,7 +26,8 @@ IoMap build_fpga_io_mapping_info(const ModuleManager& module_manager,
                                  const IoLocationMap& io_location_map,
                                  const VprNetlistAnnotation& netlist_annotation,
                                  const std::string& io_input_port_name_postfix,
-                                 const std::string& io_output_port_name_postfix);
+                                 const std::string& io_output_port_name_postfix,
+                                 const std::vector<std::string>& output_port_prefix_to_remove);
 
 } /* end namespace openfpga */
 
diff --git a/openfpga/src/fpga_verilog/verilog_formal_random_top_testbench.cpp b/openfpga/src/fpga_verilog/verilog_formal_random_top_testbench.cpp
index 710a0312d..ffc15437b 100644
--- a/openfpga/src/fpga_verilog/verilog_formal_random_top_testbench.cpp
+++ b/openfpga/src/fpga_verilog/verilog_formal_random_top_testbench.cpp
@@ -16,6 +16,7 @@
 /* Headers from openfpgautil library */
 #include "openfpga_port.h"
 #include "openfpga_digest.h"
+#include "openfpga_reserved_words.h"
 
 #include "openfpga_atom_netlist_utils.h"
 #include "simulation_utils.h"
diff --git a/openfpga/src/fpga_verilog/verilog_testbench_utils.h b/openfpga/src/fpga_verilog/verilog_testbench_utils.h
index 807d25ae5..1f9567481 100644
--- a/openfpga/src/fpga_verilog/verilog_testbench_utils.h
+++ b/openfpga/src/fpga_verilog/verilog_testbench_utils.h
@@ -23,9 +23,6 @@
 /* begin namespace openfpga */
 namespace openfpga {
 
-constexpr char* VPR_BENCHMARK_OUT_PORT_PREFIX = "out:";
-constexpr char* OPENFPGA_BENCHMARK_OUT_PORT_PREFIX = "out_";
-
 void print_verilog_testbench_fpga_instance(std::fstream& fp,
                                            const ModuleManager& module_manager,
                                            const ModuleId& top_module,