diff --git a/impl/src/main.c b/impl/src/main.c
index 8d9ee9d..9a24a13 100644
--- a/impl/src/main.c
+++ b/impl/src/main.c
@@ -320,6 +320,9 @@ int main(int argc, char **argv)
 		if(!on_air) {
 			// ** Receive signal **
 
+			const size_t CHUNKSIZE_BB = 16384;
+			const size_t CHUNKSIZE_RF = (CHUNKSIZE_BB * SDR_OVERSAMPLING);
+
 			float complex rf_samples[CHUNKSIZE_RF];
 			float complex bb_samples[CHUNKSIZE_BB];