diff --git a/src/rtl_adsb.c b/src/rtl_adsb.c
index 9087de4..7aea8dd 100644
--- a/src/rtl_adsb.c
+++ b/src/rtl_adsb.c
@@ -183,7 +183,7 @@ int magnitute(uint8_t *buf, int len)
 	return len/2;
 }
 
-inline uint16_t single_manchester(uint16_t a, uint16_t b, uint16_t c, uint16_t d)
+static inline uint16_t single_manchester(uint16_t a, uint16_t b, uint16_t c, uint16_t d)
 /* takes 4 consecutive real samples, return 0 or 1, BADSAMPLE on error */
 {
 	int bit, bit_p;
@@ -224,17 +224,17 @@ inline uint16_t single_manchester(uint16_t a, uint16_t b, uint16_t c, uint16_t d
 	return BADSAMPLE;
 }
 
-inline uint16_t min16(uint16_t a, uint16_t b)
+static inline uint16_t min16(uint16_t a, uint16_t b)
 {
 	return a<b ? a : b;
 }
 
-inline uint16_t max16(uint16_t a, uint16_t b)
+static inline uint16_t max16(uint16_t a, uint16_t b)
 {
 	return a>b ? a : b;
 }
 
-inline int preamble(uint16_t *buf, int i)
+static inline int preamble(uint16_t *buf, int i)
 /* returns 0/1 for preamble at index i */
 {
 	int i2;
diff --git a/src/rtl_power.c b/src/rtl_power.c
index 00f4d9f..625d818 100644
--- a/src/rtl_power.c
+++ b/src/rtl_power.c
@@ -250,7 +250,7 @@ void sine_table(int size)
 	}
 }
 
-inline int16_t FIX_MPY(int16_t a, int16_t b)
+static inline int16_t FIX_MPY(int16_t a, int16_t b)
 /* fixed point multiply and scale */
 {
 	int c = ((int)a * (int)b) >> 14;