diff --git a/src/Makefile.am b/src/Makefile.am
index 1ea65ea..577d7a1 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -40,7 +40,7 @@ gpredict_SOURCES = \
 	gtk-polar-plot.c gtk-polar-plot.h \
 	gtk-polar-view.c gtk-polar-view.h \
 	gtk-polar-view-popup.c gtk-polar-view-popup.h \
-	gtk-rot-ctrl.c gtk-rot-ctrl.h \
+	gtk-rot-knob.c gtk-rot-knob.h \
 	gtk-sat-data.c gtk-sat-data.h \
 	gtk-sat-list.c gtk-sat-list.h \
 	gtk-sat-list-col-sel.c gtk-sat-list-col-sel.h \
diff --git a/src/gtk-rot-ctrl.c b/src/gtk-rot-knob.c
similarity index 100%
rename from src/gtk-rot-ctrl.c
rename to src/gtk-rot-knob.c
diff --git a/src/gtk-rot-ctrl.h b/src/gtk-rot-knob.h
similarity index 100%
rename from src/gtk-rot-ctrl.h
rename to src/gtk-rot-knob.h
diff --git a/win32/Makefile b/win32/Makefile
index cf4885d..d2c69a7 100644
--- a/win32/Makefile
+++ b/win32/Makefile
@@ -90,7 +90,7 @@ GPREDICTSRC = \
 	gtk-polar-plot.c \
 	gtk-polar-view.c \
 	gtk-polar-view-popup.c \
-	gtk-rot-ctrl.c \
+	gtk-rot-knob.c \
 	gtk-sat-data.c \
 	gtk-sat-list.c \
 	gtk-sat-list-col-sel.c \