diff --git a/src/nanovg/nanovg-demo.cpp b/src/nanovg/nanovg-demo.cpp
index 880ff4626..8adb82261 100644
--- a/src/nanovg/nanovg-demo.cpp
+++ b/src/nanovg/nanovg-demo.cpp
@@ -216,7 +216,7 @@ int main(int argc, char **argv) {
         //Transfer buffer ownership back to OpenGL
         gl::release_to_gl(frameBuffer);
 
-        //if x11 is enabled it displays the framebuffer in the native window. Returns false if the window was closed.
+        //If x11 is enabled it displays the framebuffer in the native window. Returns false if the window was closed.
         if(!gl::display())
             break;
 
diff --git a/src/optflow/optflow-demo.cpp b/src/optflow/optflow-demo.cpp
index 6c9ddf86b..ab8b6ec44 100644
--- a/src/optflow/optflow-demo.cpp
+++ b/src/optflow/optflow-demo.cpp
@@ -250,7 +250,7 @@ int main(int argc, char **argv) {
         cv::cvtColor(frameBuffer, videoFrame, cv::COLOR_BGRA2RGB);
         gl::release_to_gl(frameBuffer);
 
-        //if x11 is enabled it displays the framebuffer in the native window. Returns false if the window was closed.
+        //If x11 is enabled it displays the framebuffer in the native window. Returns false if the window was closed.
         if(!gl::display())
             break;
 
diff --git a/src/tetra/tetra-demo.cpp b/src/tetra/tetra-demo.cpp
index b7711362b..46b134d9f 100644
--- a/src/tetra/tetra-demo.cpp
+++ b/src/tetra/tetra-demo.cpp
@@ -128,7 +128,7 @@ int main(int argc, char **argv) {
         //Release the frame buffer for use by OpenGL
         gl::release_to_gl(frameBuffer);
 
-        //if x11 is enabled it displays the framebuffer in the native window. Returns false if the window was closed.
+        //If x11 is enabled it displays the framebuffer in the native window. Returns false if the window was closed.
         if(!gl::display())
             break;
 
diff --git a/src/video/video-demo.cpp b/src/video/video-demo.cpp
index 6c1c1ab5e..a51fa8219 100644
--- a/src/video/video-demo.cpp
+++ b/src/video/video-demo.cpp
@@ -167,7 +167,7 @@ int main(int argc, char **argv) {
         //Release the frame buffer for use by OpenGL
         gl::release_to_gl(frameBuffer);
 
-        //if x11 is enabled it displays the framebuffer in the native window. Returns false if the window was closed.
+        //If x11 is enabled it displays the framebuffer in the native window. Returns false if the window was closed.
         if(!gl::display())
             break;