diff --git a/specter/include/specter/ViewResources.hpp b/specter/include/specter/ViewResources.hpp
index e9ae3fb9c..df12a1fcc 100644
--- a/specter/include/specter/ViewResources.hpp
+++ b/specter/include/specter/ViewResources.hpp
@@ -179,8 +179,8 @@ public:
     specter::FontTag m_curveFont;
 
     std::thread m_fcacheThread;
-    bool m_fcacheInterrupt = false;
-    bool m_fcacheReady = false;
+    std::atomic_bool m_fcacheInterrupt = {false};
+    std::atomic_bool m_fcacheReady = {false};
 
     ViewResources() = default;
     ViewResources(const ViewResources& other) = delete;
@@ -198,7 +198,7 @@ public:
     {
         if (m_fcacheThread.joinable())
         {
-            m_fcacheInterrupt = true;
+            m_fcacheInterrupt.store(true);
             m_fcacheThread.join();
         }
     }
@@ -207,7 +207,7 @@ public:
     void destroyResData();
     void prepFontCacheSync();
     void prepFontCacheAsync(boo::IWindow* window);
-    bool fontCacheReady() const { return m_fcacheReady; }
+    bool fontCacheReady() const { return m_fcacheReady.load(); }
     void resetPixelFactor(float pixelFactor);
     void resetTheme(const IThemeData* theme);
 
diff --git a/specter/lib/ViewResources.cpp b/specter/lib/ViewResources.cpp
index f6832d211..8e3d1c19c 100644
--- a/specter/lib/ViewResources.cpp
+++ b/specter/lib/ViewResources.cpp
@@ -58,33 +58,33 @@ void ViewResources::destroyResData()
 void ViewResources::prepFontCacheSync()
 {
     unsigned dpi = 72.f * m_pixelFactor;
-    if (m_fcacheInterrupt)
+    if (m_fcacheInterrupt.load())
         return;
     m_mainFont = m_fcache->prepMainFont(AllCharFilter, false, 10.f, dpi);
-    if (m_fcacheInterrupt)
+    if (m_fcacheInterrupt.load())
         return;
     m_monoFont10 = m_fcache->prepMonoFont(AllCharFilter, false, 10.f, dpi);
-    if (m_fcacheInterrupt)
+    if (m_fcacheInterrupt.load())
         return;
     m_monoFont18 = m_fcache->prepMonoFont(AllCharFilter, false, 18.f, dpi);
-    if (m_fcacheInterrupt)
+    if (m_fcacheInterrupt.load())
         return;
     m_heading14 = m_fcache->prepMainFont(LatinAndJapaneseCharFilter, false, 14.f, dpi);
-    if (m_fcacheInterrupt)
+    if (m_fcacheInterrupt.load())
         return;
     m_heading18 = m_fcache->prepMainFont(LatinAndJapaneseCharFilter, false, 18.f, dpi);
-    if (m_fcacheInterrupt)
+    if (m_fcacheInterrupt.load())
         return;
     m_titleFont = m_fcache->prepMainFont(LatinCharFilter, false, 36.f, dpi);
-    if (m_fcacheInterrupt)
+    if (m_fcacheInterrupt.load())
         return;
     m_fcache->closeBuiltinFonts();
-    m_fcacheReady = true;
+    m_fcacheReady.store(true);
 }
 
 void ViewResources::prepFontCacheAsync(boo::IWindow* window)
 {
-    m_fcacheReady = false;
+    m_fcacheReady.store(false);
     m_fcacheThread = std::thread([this]() { prepFontCacheSync(); });
 }