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1 files changed, 13 insertions, 1 deletions

diff --git a/imgui/imgui_spectrum.cpp b/imgui/imgui_spectrum.cpp
index 92667e0..30ff713 100644
--- a/imgui/imgui_spectrum.cpp
+++ b/imgui/imgui_spectrum.cpp
@@ -10,11 +10,23 @@ namespace ImGui {
             ImGuiIO& io = ImGui::GetIO();
 			ImFontConfig config;
 			config.MergeMode = true;
+
+			static const ImWchar rr[] =
+			{
+				0x2192, 0x2193, // Basic Latin + Latin Supplement
+				0,
+			};
+
+			ImFontGlyphRangesBuilder builder;
+			ImVector<ImWchar> ranges;
+			builder.AddRanges(io.Fonts->GetGlyphRangesDefault());
+			builder.AddRanges(rr);
+			builder.BuildRanges(&ranges);
 			
 			ImFont* font = io.Fonts->AddFontFromMemoryCompressedTTF(
 				SourceSansProRegular_compressed_data, 
 				SourceSansProRegular_compressed_size, 
-				size, nullptr, nullptr);
+				size, nullptr, ranges.Data);
 
 			IM_ASSERT(font != nullptr);
 			io.FontDefault = font;