diff --git a/aegisub/build/libaegisub_vs2008/libaegisub_vs2008.vcproj b/aegisub/build/libaegisub_vs2008/libaegisub_vs2008.vcproj
index 1807af120..e44f7553f 100644
--- a/aegisub/build/libaegisub_vs2008/libaegisub_vs2008.vcproj
+++ b/aegisub/build/libaegisub_vs2008/libaegisub_vs2008.vcproj
@@ -462,7 +462,7 @@
 				>
 			</File>
 			<File
-				RelativePath="..\..\libaegisub\include\libaegisub\signals.h"
+				RelativePath="..\..\libaegisub\include\libaegisub\signal.h"
 				>
 			</File>
 			<File
diff --git a/aegisub/libaegisub/include/libaegisub/option_value.h b/aegisub/libaegisub/include/libaegisub/option_value.h
index 8e0016480..9f56538bf 100644
--- a/aegisub/libaegisub/include/libaegisub/option_value.h
+++ b/aegisub/libaegisub/include/libaegisub/option_value.h
@@ -28,7 +28,7 @@
 
 #include <libaegisub/colour.h>
 #include <libaegisub/exception.h>
-#include <libaegisub/signals.h>
+#include <libaegisub/signal.h>
 
 namespace agi {
 
diff --git a/aegisub/libaegisub/include/libaegisub/signals.h b/aegisub/libaegisub/include/libaegisub/signal.h
similarity index 99%
rename from aegisub/libaegisub/include/libaegisub/signals.h
rename to aegisub/libaegisub/include/libaegisub/signal.h
index 12c65fd2d..82bfd92ae 100644
--- a/aegisub/libaegisub/include/libaegisub/signals.h
+++ b/aegisub/libaegisub/include/libaegisub/signal.h
@@ -14,7 +14,7 @@
 //
 // $Id$
 
-/// @file signals.h
+/// @file signal.h
 /// @brief 
 /// @ingroup libaegisub
 
diff --git a/aegisub/src/ass_file.h b/aegisub/src/ass_file.h
index ec6800e1c..0c81838b2 100644
--- a/aegisub/src/ass_file.h
+++ b/aegisub/src/ass_file.h
@@ -45,7 +45,7 @@
 #include <wx/arrstr.h>
 #endif
 
-#include <libaegisub/signals.h>
+#include <libaegisub/signal.h>
 
 class FrameRate;
 class AssDialogue;
diff --git a/aegisub/src/audio_controller.h b/aegisub/src/audio_controller.h
index 00df80516..81d7adfa4 100644
--- a/aegisub/src/audio_controller.h
+++ b/aegisub/src/audio_controller.h
@@ -49,7 +49,7 @@
 
 #include <libaegisub/exception.h>
 #include <libaegisub/scoped_ptr.h>
-#include <libaegisub/signals.h>
+#include <libaegisub/signal.h>
 
 class AudioPlayer;
 class AudioProvider;
diff --git a/aegisub/src/audio_display.h b/aegisub/src/audio_display.h
index 46c609d3c..f6fd0f4c9 100644
--- a/aegisub/src/audio_display.h
+++ b/aegisub/src/audio_display.h
@@ -48,7 +48,7 @@
 #endif
 
 #include <libaegisub/scoped_ptr.h>
-#include <libaegisub/signals.h>
+#include <libaegisub/signal.h>
 
 
 class AudioRenderer;
diff --git a/aegisub/src/audio_timing.h b/aegisub/src/audio_timing.h
index 27fbcf558..1bb193e22 100644
--- a/aegisub/src/audio_timing.h
+++ b/aegisub/src/audio_timing.h
@@ -39,7 +39,7 @@ class AssDialogue;
 class AssFile;
 class AudioController;
 
-#include <libaegisub/signals.h>
+#include <libaegisub/signal.h>
 
 /// @class AudioTimingController
 /// @brief Base class for objects controlling audio timing
diff --git a/aegisub/src/subs_grid.h b/aegisub/src/subs_grid.h
index 5d1332860..f5225a466 100644
--- a/aegisub/src/subs_grid.h
+++ b/aegisub/src/subs_grid.h
@@ -46,7 +46,7 @@
 
 #include "base_grid.h"
 
-#include <libaegisub/signals.h>
+#include <libaegisub/signal.h>
 
 namespace agi { class OptionValue; }
 
diff --git a/aegisub/src/video_context.h b/aegisub/src/video_context.h
index 9de93fbba..6fbc896fd 100644
--- a/aegisub/src/video_context.h
+++ b/aegisub/src/video_context.h
@@ -49,7 +49,7 @@
 #error "Aegisub requires wxWidgets to be compiled with OpenGL support."
 #endif
 
-#include <libaegisub/signals.h>
+#include <libaegisub/signal.h>
 #include <libaegisub/vfr.h>
 
 class AegiVideoFrame;
diff --git a/aegisub/src/video_display.h b/aegisub/src/video_display.h
index f96f1016d..a705eb17f 100644
--- a/aegisub/src/video_display.h
+++ b/aegisub/src/video_display.h
@@ -42,7 +42,7 @@
 #include <memory>
 #endif
 
-#include <libaegisub/signals.h>
+#include <libaegisub/signal.h>
 
 // Prototypes
 class AssFile;
diff --git a/aegisub/tests/libaegisub_signals.cpp b/aegisub/tests/libaegisub_signals.cpp
index fc83cc7ac..a56710ff8 100644
--- a/aegisub/tests/libaegisub_signals.cpp
+++ b/aegisub/tests/libaegisub_signals.cpp
@@ -18,7 +18,7 @@
 /// @brief agi::signals tests
 /// @ingroup 
 
-#include <libaegisub/signals.h>
+#include <libaegisub/signal.h>
 
 #include "main.h"