diff --git a/src/gui/gui.cpp b/src/gui/gui.cpp
index 4785ee81..5153e1f6 100644
--- a/src/gui/gui.cpp
+++ b/src/gui/gui.cpp
@@ -5216,6 +5216,8 @@ FurnaceGUI::FurnaceGUI():
   macroOffY(0),
   macroScaleX(100.0f),
   macroScaleY(100.0f),
+  macroRandMin(0),
+  macroRandMax(0),
   macroLoopDragStart(0,0),
   macroLoopDragAreaSize(0,0),
   macroLoopDragTarget(NULL),
diff --git a/src/gui/gui.h b/src/gui/gui.h
index b71fe368..1c8ee713 100644
--- a/src/gui/gui.h
+++ b/src/gui/gui.h
@@ -1446,6 +1446,7 @@ class FurnaceGUI {
   FurnaceGUIMacroDesc lastMacroDesc;
   int macroOffX, macroOffY;
   float macroScaleX, macroScaleY;
+  int macroRandMin, macroRandMax;
 
   ImVec2 macroLoopDragStart;
   ImVec2 macroLoopDragAreaSize;
diff --git a/src/gui/insEdit.cpp b/src/gui/insEdit.cpp
index df92dd52..b5347cbe 100644
--- a/src/gui/insEdit.cpp
+++ b/src/gui/insEdit.cpp
@@ -4556,6 +4556,28 @@ void FurnaceGUI::drawInsEdit() {
         }
         ImGui::EndMenu();
       }
+      if (ImGui::BeginMenu("randomize...")) {
+        if (macroRandMin<lastMacroDesc.min) macroRandMin=lastMacroDesc.min;
+        if (macroRandMin>lastMacroDesc.max) macroRandMin=lastMacroDesc.max;
+        if (macroRandMax<lastMacroDesc.min) macroRandMax=lastMacroDesc.min;
+        if (macroRandMax>lastMacroDesc.max) macroRandMax=lastMacroDesc.max;
+        ImGui::InputInt("Min",&macroRandMin,1,10);
+        ImGui::InputInt("Max",&macroRandMax,1,10);
+        if (ImGui::Button("randomize")) {
+          for (int i=0; i<lastMacroDesc.macro->len; i++) {
+            int val=0;
+            if (macroRandMax<=macroRandMin) {
+              val=macroRandMin;
+            } else {
+              val=macroRandMin+(rand()%(macroRandMax-macroRandMin+1));
+            }
+            lastMacroDesc.macro->val[i]=val;
+          }
+
+          ImGui::CloseCurrentPopup();
+        }
+        ImGui::EndMenu();
+      }
       
       ImGui::EndPopup();
     }