diff --git a/src/options.c b/src/options.c
index 9d2fc73fb..0468acf40 100644
--- a/src/options.c
+++ b/src/options.c
@@ -60,7 +60,7 @@ static char snrmask_[NFREQ][1024];
 #define TIDEOPT "0:off,1:on,2:otl"
 #define PHWOPT  "0:off,1:on,2:precise"
 
-EXPORT opt_t sysopts[]={
+opt_t sysopts[]={
     {"pos1-posmode",    3,  (void *)&prcopt_.mode,       MODOPT },
     {"pos1-frequency",  3,  (void *)&prcopt_.nf,         FRQOPT },
     {"pos1-soltype",    3,  (void *)&prcopt_.soltype,    TYPOPT },
diff --git a/src/rcv/cmr.c b/src/rcv/cmr.c
index 67eb0ef91..e33c08e3e 100644
--- a/src/rcv/cmr.c
+++ b/src/rcv/cmr.c
@@ -1370,7 +1370,7 @@ static unsigned int ubitn(const unsigned char *Address, int BitPosition, int Bit
 */
 
 /* free_cmr - Free up CMR dependent private storage */
-EXPORT void free_cmr(raw_t *Raw)
+void free_cmr(raw_t *Raw)
 {
     cmr_t *Cmr = NULL;
     
@@ -1409,7 +1409,7 @@ EXPORT void free_cmr(raw_t *Raw)
 }
 
 /* init_cmr = Initialize CMR dependent private storage */
-EXPORT int init_cmr(raw_t *Raw)
+int init_cmr(raw_t *Raw)
 {
     cmr_t *Cmr = NULL;
     obsr_t *RoverObservables = NULL;
@@ -1473,7 +1473,7 @@ EXPORT int init_cmr(raw_t *Raw)
 |
 | Supported CMR messages: 0, 1, 2, 3, 4; CMR+ messages 1, 2, 3.
 */
-EXPORT int input_cmr(raw_t *Raw, unsigned char Data)
+int input_cmr(raw_t *Raw, unsigned char Data)
 {
     cmr_t *Cmr = (cmr_t*) Raw->rcv_data;
     unsigned char *MessageBuffer = Cmr->MessageBuffer;
diff --git a/src/rcv/rt17.c b/src/rcv/rt17.c
index 50ebe0b60..c31fc1bf1 100644
--- a/src/rcv/rt17.c
+++ b/src/rcv/rt17.c
@@ -436,7 +436,7 @@ static void UnwrapGenout(rt17_t *rt17);
 /* Public functions (in alphabetical order): */
 
 /* free_rt17 - Free up RT17 dependent private storage */
-EXPORT void free_rt17(raw_t *Raw)
+void free_rt17(raw_t *Raw)
 {
     rt17_t *rt17 = NULL;
     
@@ -466,7 +466,7 @@ EXPORT void free_rt17(raw_t *Raw)
 }
 
 /* init_rt17 = Initialize RT17 dependent private storage */
-EXPORT int init_rt17(raw_t *Raw)
+int init_rt17(raw_t *Raw)
 {
 	rt17_t *rt17 = NULL;
     unsigned char *MessageBuffer = NULL, *PacketBuffer = NULL;
@@ -515,7 +515,7 @@ EXPORT int init_rt17(raw_t *Raw)
 | and the packet ends with a 2-byte trailer. Byte 3 is set to 0 (00h) when the packet
 | contains no data.
 */
-EXPORT int input_rt17(raw_t *Raw, unsigned char Data)
+int input_rt17(raw_t *Raw, unsigned char Data)
 {
     rt17_t *rt17 = (rt17_t*) Raw->rcv_data;
     unsigned char *MessageBuffer = rt17->MessageBuffer;
@@ -723,7 +723,7 @@ EXPORT int input_rt17(raw_t *Raw, unsigned char Data)
 |  2: input ephemeris
 |  9: input ion/utc parameter
 */
-EXPORT int input_rt17f(raw_t *Raw, FILE *fp)
+int input_rt17f(raw_t *Raw, FILE *fp)
 {
     int i, Data, Ret;