diff --git a/plugins/LadspaEffect/swh/hermes_filter_1200.c b/plugins/LadspaEffect/swh/hermes_filter_1200.c
index bf3bbbad5..a8dd28e98 100644
--- a/plugins/LadspaEffect/swh/hermes_filter_1200.c
+++ b/plugins/LadspaEffect/swh/hermes_filter_1200.c
@@ -117,7 +117,7 @@ inline void setup_f_svf(sv_filter *sv, const float fs, const float fc) {
 
 /* Run one sample through the SV filter. Filter is by andy@vellocet */
 
-inline float run_svf(sv_filter *sv, float in) {
+static inline float run_svf(sv_filter *sv, float in) {
         float out;
         int i;
 
@@ -144,7 +144,7 @@ inline float run_svf(sv_filter *sv, float in) {
         return out;
 }
 
-inline int wave_tbl(const float wave) {
+static inline int wave_tbl(const float wave) {
         switch (f_round(wave)) {
                 case 0:
                 return BLO_SINE;
diff --git a/plugins/LadspaEffect/swh/imp_1199.c b/plugins/LadspaEffect/swh/imp_1199.c
index d172a927d..90e8e8c33 100644
--- a/plugins/LadspaEffect/swh/imp_1199.c
+++ b/plugins/LadspaEffect/swh/imp_1199.c
@@ -63,7 +63,7 @@ typedef rfftw_plan fft_plan;
 
 #define MK_IMP(i) impulse2freq(c, i, IMP_LENGTH(i), impulse_freq[c]); c++
 
-inline void impulse2freq(int id, float *imp, unsigned int length, fftw_real *out);
+static inline void impulse2freq(int id, float *imp, unsigned int length, fftw_real *out);
 
 #include "impulses/all.h"
 
@@ -77,7 +77,7 @@ unsigned int fft_length[IMPULSES];
 #ifdef __clang__
 void impulse2freq(int id, float *imp, unsigned int length, fftw_real *out)
 #else
-inline void impulse2freq(int id, float *imp, unsigned int length, fftw_real *out)
+static inline void impulse2freq(int id, float *imp, unsigned int length, fftw_real *out)
 #endif
 {
   fftw_real impulse_time[MAX_FFT_LENGTH];
diff --git a/plugins/LadspaEffect/swh/impulses/all.h b/plugins/LadspaEffect/swh/impulses/all.h
index 3355f327f..b0897fb5e 100644
--- a/plugins/LadspaEffect/swh/impulses/all.h
+++ b/plugins/LadspaEffect/swh/impulses/all.h
@@ -27,7 +27,7 @@
 #ifdef __clang__
 void mk_imps(fftw_real **impulse_freq)
 #else
-inline void mk_imps(fftw_real **impulse_freq)
+static inline void mk_imps(fftw_real **impulse_freq)
 #endif
 {
 	int c = 0;
diff --git a/plugins/LadspaEffect/swh/retro_flange_1208.c b/plugins/LadspaEffect/swh/retro_flange_1208.c
index c96dff58e..9c7fb4fe4 100644
--- a/plugins/LadspaEffect/swh/retro_flange_1208.c
+++ b/plugins/LadspaEffect/swh/retro_flange_1208.c
@@ -31,7 +31,7 @@ void __attribute__((constructor)) swh_init(); // forward declaration
 
 #define BASE_BUFFER 0.001 // Base buffer length (s)
 
-inline LADSPA_Data sat(LADSPA_Data x, float q,  float dist) {
+static inline LADSPA_Data sat(LADSPA_Data x, float q,  float dist) {
         if (x == q) {
                 return 1.0f / dist + q / (1.0f - f_exp(dist * q));
         }