diff --git a/plugins/LadspaEffect/calf/src/audio_fx.cpp b/plugins/LadspaEffect/calf/src/audio_fx.cpp
index f42ccc0a834..721a32ad571 100644
--- a/plugins/LadspaEffect/calf/src/audio_fx.cpp
+++ b/plugins/LadspaEffect/calf/src/audio_fx.cpp
@@ -731,6 +731,7 @@ void lookahead_limiter::process(float &left, float &right, float * multi_buffer)
                 _peak = fabs(buffer[nextpos[j]]) > fabs(buffer[nextpos[j] + 1]) ? fabs(buffer[nextpos[j]]) : fabs(buffer[nextpos[j] + 1]);
                 // calc a delta to use to reach our incoming peak from the
                 // stored position
+                _peak = std::max( _peak, 0.000001f );
                 _delta = (_limit / peak - (limit * _multi_coeff * weight) / _peak) / (((buffer_size - nextpos[j] + pos) % buffer_size) / channels);
                 if(_delta < nextdelta[j]) {
                     // if the buffered delta is more important than the delta
diff --git a/plugins/LadspaEffect/swh/dyson_compress_1403.c b/plugins/LadspaEffect/swh/dyson_compress_1403.c
index 25e0b7d64cc..27062f051a6 100644
--- a/plugins/LadspaEffect/swh/dyson_compress_1403.c
+++ b/plugins/LadspaEffect/swh/dyson_compress_1403.c
@@ -836,7 +836,7 @@ static void __attribute__((constructor)) swh_init() {
 		 D_("Release time (s)");
 		port_range_hints[DYSONCOMPRESS_RELEASE_TIME].HintDescriptor =
 		 LADSPA_HINT_BOUNDED_BELOW | LADSPA_HINT_BOUNDED_ABOVE | LADSPA_HINT_DEFAULT_LOW;
-		port_range_hints[DYSONCOMPRESS_RELEASE_TIME].LowerBound = 0;
+		port_range_hints[DYSONCOMPRESS_RELEASE_TIME].LowerBound = 0.0000001;
 		port_range_hints[DYSONCOMPRESS_RELEASE_TIME].UpperBound = 1;
 
 		/* Parameters for Fast compression ratio */
diff --git a/plugins/LadspaEffect/swh/shaper_1187.c b/plugins/LadspaEffect/swh/shaper_1187.c
index c1a52906bf7..7adfb3abdf8 100644
--- a/plugins/LadspaEffect/swh/shaper_1187.c
+++ b/plugins/LadspaEffect/swh/shaper_1187.c
@@ -115,8 +115,8 @@ static void runShaper(LADSPA_Handle instance, unsigned long sample_count) {
 	
 	if (shapep < 1.0f && shapep > -1.0f) {
 	        shape = 1.0f;
-	} else if (shape < 0) {
-	        shape = -1.0f / shape;
+	} else if (shapep < 0) {
+	        shape = -1.0f / shapep;
 	} else {
 	        shape = shapep;
 	}
@@ -160,8 +160,8 @@ static void runAddingShaper(LADSPA_Handle instance, unsigned long sample_count)
 	
 	if (shapep < 1.0f && shapep > -1.0f) {
 	        shape = 1.0f;
-	} else if (shape < 0) {
-	        shape = -1.0f / shape;
+	} else if (shapep < 0) {
+	        shape = -1.0f / shapep;
 	} else {
 	        shape = shapep;
 	}