diff --git a/reference/opt/shaders/legacy/fragment/switch.legacy.frag b/reference/opt/shaders/legacy/fragment/switch.legacy.frag
index 21a4d673..1920958d 100644
--- a/reference/opt/shaders/legacy/fragment/switch.legacy.frag
+++ b/reference/opt/shaders/legacy/fragment/switch.legacy.frag
@@ -10,7 +10,7 @@ void main()
     highp vec4 _65;
     highp vec4 _66;
     highp vec4 _68;
-    for (int SPIRV_Cross_Dummy = 0; SPIRV_Cross_Dummy < 1; SPIRV_Cross_Dummy++)
+    for (int SPIRV_Cross_Dummy25 = 0; SPIRV_Cross_Dummy25 < 1; SPIRV_Cross_Dummy25++)
     {
         if (_13 == 2)
         {
@@ -59,7 +59,7 @@ void main()
         }
     }
     highp vec4 _70;
-    for (int SPIRV_Cross_Dummy = 0; SPIRV_Cross_Dummy < 1; SPIRV_Cross_Dummy++)
+    for (int SPIRV_Cross_Dummy146 = 0; SPIRV_Cross_Dummy146 < 1; SPIRV_Cross_Dummy146++)
     {
         if ((_13 == 10) || (_13 == 20))
         {
diff --git a/reference/opt/shaders/legacy/vert/switch-nested.legacy.vert b/reference/opt/shaders/legacy/vert/switch-nested.legacy.vert
new file mode 100644
index 00000000..fb8d46ec
--- /dev/null
+++ b/reference/opt/shaders/legacy/vert/switch-nested.legacy.vert
@@ -0,0 +1,43 @@
+#version 100
+
+struct UBO
+{
+    int func_arg;
+    int inner_func_arg;
+};
+
+uniform UBO _34;
+
+void main()
+{
+    vec4 _102;
+    for (int SPIRV_Cross_Dummy30 = 0; SPIRV_Cross_Dummy30 < 1; SPIRV_Cross_Dummy30++)
+    {
+        if (_34.func_arg != 0)
+        {
+            vec4 _101;
+            for (int SPIRV_Cross_Dummy45 = 0; SPIRV_Cross_Dummy45 < 1; SPIRV_Cross_Dummy45++)
+            {
+                if (_34.inner_func_arg != 0)
+                {
+                    _101 = vec4(1.0);
+                    break;
+                }
+                else
+                {
+                    _101 = vec4(0.0);
+                    break;
+                }
+            }
+            _102 = _101;
+            break;
+        }
+        else
+        {
+            _102 = vec4(0.0);
+            break;
+        }
+    }
+    gl_Position = _102;
+}
+
diff --git a/reference/shaders-no-opt/legacy/frag/switch-single-case-multiple-exit-cfg.legacy.asm.frag b/reference/shaders-no-opt/legacy/frag/switch-single-case-multiple-exit-cfg.legacy.asm.frag
index d36e7827..cc5cb716 100644
--- a/reference/shaders-no-opt/legacy/frag/switch-single-case-multiple-exit-cfg.legacy.asm.frag
+++ b/reference/shaders-no-opt/legacy/frag/switch-single-case-multiple-exit-cfg.legacy.asm.frag
@@ -7,7 +7,7 @@ vec2 _19;
 void main()
 {
     highp vec2 _30;
-    for (int SPIRV_Cross_Dummy = 0; SPIRV_Cross_Dummy < 1; SPIRV_Cross_Dummy++)
+    for (int SPIRV_Cross_Dummy15 = 0; SPIRV_Cross_Dummy15 < 1; SPIRV_Cross_Dummy15++)
     {
         if (gl_FragCoord.x != gl_FragCoord.x)
         {
diff --git a/reference/shaders/legacy/fragment/switch.legacy.frag b/reference/shaders/legacy/fragment/switch.legacy.frag
index 9960ce7e..a70168e6 100644
--- a/reference/shaders/legacy/fragment/switch.legacy.frag
+++ b/reference/shaders/legacy/fragment/switch.legacy.frag
@@ -8,7 +8,7 @@ void main()
 {
     int vIndex = int(vIndexF);
     highp vec4 v = vec4(0.0);
-    for (int SPIRV_Cross_Dummy = 0; SPIRV_Cross_Dummy < 1; SPIRV_Cross_Dummy++)
+    for (int SPIRV_Cross_Dummy21 = 0; SPIRV_Cross_Dummy21 < 1; SPIRV_Cross_Dummy21++)
     {
         if (vIndex == 2)
         {
@@ -65,7 +65,7 @@ void main()
         }
     }
     highp vec4 w = vec4(20.0);
-    for (int SPIRV_Cross_Dummy = 0; SPIRV_Cross_Dummy < 1; SPIRV_Cross_Dummy++)
+    for (int SPIRV_Cross_Dummy165 = 0; SPIRV_Cross_Dummy165 < 1; SPIRV_Cross_Dummy165++)
     {
         if ((vIndex == 10) || (vIndex == 20))
         {
diff --git a/reference/shaders/legacy/vert/switch-nested.legacy.vert b/reference/shaders/legacy/vert/switch-nested.legacy.vert
new file mode 100644
index 00000000..3ec027b4
--- /dev/null
+++ b/reference/shaders/legacy/vert/switch-nested.legacy.vert
@@ -0,0 +1,41 @@
+#version 100
+
+struct UBO
+{
+    int func_arg;
+    int inner_func_arg;
+};
+
+uniform UBO _34;
+
+vec4 test_inner_func(bool b)
+{
+    if (b)
+    {
+        return vec4(1.0);
+    }
+    else
+    {
+        return vec4(0.0);
+    }
+}
+
+vec4 test_func(bool b)
+{
+    if (b)
+    {
+        bool param = _34.inner_func_arg != 0;
+        return test_inner_func(param);
+    }
+    else
+    {
+        return vec4(0.0);
+    }
+}
+
+void main()
+{
+    bool param = _34.func_arg != 0;
+    gl_Position = test_func(param);
+}
+
diff --git a/shaders/legacy/vert/switch-nested.legacy.vert b/shaders/legacy/vert/switch-nested.legacy.vert
new file mode 100644
index 00000000..6726c1c6
--- /dev/null
+++ b/shaders/legacy/vert/switch-nested.legacy.vert
@@ -0,0 +1,28 @@
+#version 450
+
+layout(set = 0, binding = 0) uniform UBO
+{
+	int func_arg;
+	int inner_func_arg;
+};
+
+vec4 test_inner_func(bool b)
+{
+	if (b)
+		return vec4(1.0);
+	else
+		return vec4(0.0);
+}
+
+vec4 test_func(bool b)
+{
+	if (b)
+		return test_inner_func(inner_func_arg != 0);
+	else
+		return vec4(0.0);
+}
+
+void main()
+{
+	gl_Position = test_func(func_arg != 0);
+}
diff --git a/spirv_glsl.cpp b/spirv_glsl.cpp
index 5f2a48f0..f6a42a4e 100644
--- a/spirv_glsl.cpp
+++ b/spirv_glsl.cpp
@@ -13386,7 +13386,11 @@ void CompilerGLSL::emit_block_chain(SPIRBlock &block)
 		{
 			// ESSL 1.0 is not guaranteed to support do/while.
 			if (is_legacy_es())
-				statement("for (int SPIRV_Cross_Dummy = 0; SPIRV_Cross_Dummy < 1; SPIRV_Cross_Dummy++)");
+			{
+				uint32_t counter = statement_count;
+				statement("for (int SPIRV_Cross_Dummy", counter,
+				          " = 0; SPIRV_Cross_Dummy", counter, " < 1; SPIRV_Cross_Dummy", counter, "++)");
+			}
 			else
 				statement("do");
 		}