diff --git a/include/fp16/fp16.h b/include/fp16/fp16.h
index 6fde4ca..be0bb3c 100644
--- a/include/fp16/fp16.h
+++ b/include/fp16/fp16.h
@@ -419,7 +419,6 @@ static inline uint16_t fp16_alt_from_fp32_value(float f) {
 	const float bias = fp32_from_bits((shl1_bias >> 1) + ((exp_difference + 2) << 23));
 	const float base = fp32_from_bits((shl1_base >> 1) + (2 << 23)) + bias;
 
-	const uint32_t bias_difference = 0x7F - 0xF;
 	const uint32_t exp_f = fp32_to_bits(base) >> 13;
 	return (sign >> 16) | ((exp_f & UINT32_C(0x00007C00)) + (fp32_to_bits(base) & UINT32_C(0x00000FFF)));
 }
diff --git a/test/ieee-to-fp32-bits.cc b/test/ieee-to-fp32-bits.cc
index a92e1dd..284e1b1 100644
--- a/test/ieee-to-fp32-bits.cc
+++ b/test/ieee-to-fp32-bits.cc
@@ -248,7 +248,7 @@ TEST(FP16_IEEE_TO_FP32_BITS, positive_nan) {
 			"F32(F16) = 0x" << std::setw(8) << nan_f32;
 
 		/* Check mantissa */
-		EXPECT_NE(nan_f32 & UINT32_C(0x007FFFFF), 0) <<
+		EXPECT_NE(nan_f32 & UINT32_C(0x007FFFFF), UINT32_C(0)) <<
 			std::hex << std::uppercase << std::setfill('0') <<
 			"F16 = 0x" << std::setw(4) << nan_f16 << ", " <<
 			"F32(F16) = 0x" << std::setw(8) << nan_f32;
@@ -261,7 +261,7 @@ TEST(FP16_IEEE_TO_FP32_BITS, negative_nan) {
 		const uint32_t nan_f32 = fp16_ieee_to_fp32_bits(nan_f16);
 
 		/* Check sign */
-		EXPECT_NE(nan_f32 & UINT32_C(0x80000000), 0) <<
+		EXPECT_NE(nan_f32 & UINT32_C(0x80000000), UINT32_C(0)) <<
 			std::hex << std::uppercase << std::setfill('0') <<
 			"F16 = 0x" << std::setw(4) << nan_f16 << ", " <<
 			"F32(F16) = 0x" << std::setw(8) << nan_f32;
@@ -273,7 +273,7 @@ TEST(FP16_IEEE_TO_FP32_BITS, negative_nan) {
 			"F32(F16) = 0x" << std::setw(8) << nan_f32;
 
 		/* Check mantissa */
-		EXPECT_NE(nan_f32 & UINT32_C(0x007FFFFF), 0) <<
+		EXPECT_NE(nan_f32 & UINT32_C(0x007FFFFF), UINT32_C(0)) <<
 			std::hex << std::uppercase << std::setfill('0') <<
 			"F16 = 0x" << std::setw(4) << nan_f16 << ", " <<
 			"F32(F16) = 0x" << std::setw(8) << nan_f32;