diff --git a/libsgp4/Makefile.am b/libsgp4/Makefile.am
index 6252e21..7342273 100644
--- a/libsgp4/Makefile.am
+++ b/libsgp4/Makefile.am
@@ -1,30 +1,33 @@
 lib_LIBRARIES = libsgp4.a
 libsgp4_a_SOURCES = \
-			CoordGeodetic.cpp \
-			CoordTopocentric.cpp \
-			DateTime.cpp \
-			Eci.cpp \
-			Globals.cpp \
-			Observer.cpp \
-			OrbitalElements.cpp \
-			SGP4.cpp \
-			SolarPosition.cpp \
-			TimeSpan.cpp \
-			Tle.cpp \
-			Util.cpp \
-			Vector.cpp
-include_HEADERS = CoordGeodetic.h \
-			Eci.h \
-			OrbitalElements.h \
-			SatelliteException.h \
-			TleException.h \
-			Vector.h \
-			CoordTopocentric.h \
-			Globals.h \
-			Observer.h \
-			SGP4.h \
-			SolarPosition.h \
-			Tle.h \
-			Util.h \
-			TimeSpan.h \
-			DateTime.h
+	CoordGeodetic.cpp    \
+	CoordTopocentric.cpp \
+	DateTime.cpp         \
+	Eci.cpp              \
+	Globals.cpp          \
+	Observer.cpp         \
+	OrbitalElements.cpp  \
+	SGP4.cpp             \
+	SolarPosition.cpp    \
+	TimeSpan.cpp         \
+	Tle.cpp              \
+	Util.cpp             \
+	Vector.cpp
+
+include_HEADERS =  \
+	CoordGeodetic.h      \
+	CoordTopocentric.h   \
+	DateTime.h           \
+	DecayedException.h   \
+	Eci.h                \
+	Globals.h            \
+	Observer.h           \
+	OrbitalElements.h    \
+	SatelliteException.h \
+	SGP4.h               \
+	SolarPosition.h      \
+	TimeSpan.h           \
+	Tle.h                \
+	TleException.h       \
+	Util.h               \
+	Vector.h