diff --git a/configure.ac b/configure.ac
index e76105a..9e9897a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -58,6 +58,8 @@ AS_IF([test "x$with_alsa" != "xyes" -a "x$with_sdr" != "xyes"],[AC_MSG_NOTICE( W
 
 SOAPY_CFLAGS="$soapy_0_8_0_or_higher"
 
+AM_CONDITIONAL(HAVE_MOBILE, true)
+
 AC_CONFIG_FILES([src/liblogging/Makefile
     src/liboptions/Makefile
     src/libmobile/Makefile
diff --git a/src/dcf77/main.c b/src/dcf77/main.c
index 5c410b1..8a52c9e 100755
--- a/src/dcf77/main.c
+++ b/src/dcf77/main.c
@@ -661,3 +661,6 @@ error:
 
 void osmo_cc_set_log_cat(int __attribute__((unused)) cc_log_cat) {}
 
+void *get_sender_by_empfangsfrequenz(void);
+void *get_sender_by_empfangsfrequenz(void) { return NULL; }
+
diff --git a/src/libsound/Makefile.am b/src/libsound/Makefile.am
index 6cd6535..091c27d 100644
--- a/src/libsound/Makefile.am
+++ b/src/libsound/Makefile.am
@@ -6,3 +6,8 @@ libsound_a_SOURCES = \
 	sound_alsa.c
 
 AM_CPPFLAGS += -DHAVE_ALSA
+
+if HAVE_MOBILE
+AM_CPPFLAGS += -DHAVE_MOBILE
+endif
+
diff --git a/src/magnetic/main.c b/src/magnetic/main.c
index 2281752..b247f44 100644
--- a/src/magnetic/main.c
+++ b/src/magnetic/main.c
@@ -367,4 +367,11 @@ done:
 
 void osmo_cc_set_log_cat(int __attribute__((unused)) cc_log_cat) {}
 
+void display_measurements_add(void);
+void *display_measurements_update(void);
+void *get_sender_by_empfangsfrequenz(void);
+void display_measurements_add(void) {}
+void *display_measurements_update(void) { return NULL; }
+void *get_sender_by_empfangsfrequenz(void) { return NULL; }
+
 #endif /* ARDUINO */