diff --git a/src/Makefile.am b/src/Makefile.am
index d0108050..e01cec16 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -104,7 +104,6 @@ modem_manager_SOURCES = \
 	mm-generic-gsm.h \
 	mm-modem-cdma.c \
 	mm-modem-cdma.h \
-	mm-modem-gsm.h \
 	mm-modem-gsm-card.c \
 	mm-modem-gsm-card.h \
 	mm-modem-gsm-network.c \