diff --git a/plugin.json b/plugin.json
index 1dad1e8..82d6739 100644
--- a/plugin.json
+++ b/plugin.json
@@ -73,4 +73,4 @@
       ]
     }
   ]
-}
\ No newline at end of file
+}
diff --git a/src/simd_mask.hpp b/src/simd_mask.hpp
index 158a3ce..322bc8c 100644
--- a/src/simd_mask.hpp
+++ b/src/simd_mask.hpp
@@ -24,13 +24,15 @@ struct ChannelMask {
 
 	inline void apply(simd::float_4 *vec, int numChannels) {
 		int c=numChannels/4;
-		vec[c] = vec[c]&mask[numChannels-4*c];
+		if(c<4) vec[c] = vec[c]&mask[numChannels-4*c];
 	}
 
 	inline void apply_all(simd::float_4 *vec, int numChannels) {
 		int c=numChannels/4;
-		vec[c] = vec[c]&mask[numChannels-4*c];
-		for(int i=c+1; i<4; i++) vec[i] = simd::float_4::zero();
+		if(c<4) {
+               		vec[c] = vec[c]&mask[numChannels-4*c];
+			for(int i=c+1; i<4; i++) vec[i] = simd::float_4::zero();
+		}
 	}