diff --git a/src/si5351.cpp b/src/si5351.cpp
index e140d65..6aa2daa 100644
--- a/src/si5351.cpp
+++ b/src/si5351.cpp
@@ -565,7 +565,7 @@ void Si5351::set_pll(uint64_t pll_freq, enum si5351_pll target_pll)
 		pllb_freq = pll_freq;
   }
 
-  delete params;
+  delete[] params;
 }
 
 /*
@@ -672,7 +672,7 @@ void Si5351::set_ms(enum si5351_clock clk, struct Si5351RegSet ms_reg, uint8_t i
 			break;
 	}
 
-	delete params;
+	delete[] params;
 }
 
 /*
@@ -1240,7 +1240,7 @@ void Si5351::set_vcxo(uint64_t pll_freq, uint8_t ppm)
 	// Write the parameters
 	si5351_write_bulk(SI5351_PLLB_PARAMETERS, i, params);
 
-	delete params;
+	delete[] params;
 
 	// Write the VCXO parameters
 	vcxo_param = ((vcxo_param * ppm * SI5351_VCXO_MARGIN) / 100ULL) / 1000000ULL;