diff --git a/src/ipa/libipa/fixedpoint.h b/src/ipa/libipa/fixedpoint.h
index 709cf50f0fcd..b4a7fa5e0ecd 100644
--- a/src/ipa/libipa/fixedpoint.h
+++ b/src/ipa/libipa/fixedpoint.h
@@ -49,6 +49,9 @@ constexpr R fixedToFloatingPoint(T number)
 	static_assert(sizeof(int) >= sizeof(T));
 	static_assert(I + F <= sizeof(T) * 8);
 
+	if constexpr (std::is_unsigned_v<T>)
+		return static_cast<R>(number) / static_cast<R>(1 << F);
+
 	/*
 	 * Recreate the upper bits in case of a negative number by shifting the sign
 	 * bit from the fixed point to the first bit of the unsigned and then right shifting
diff --git a/test/ipa/libipa/fixedpoint.cpp b/test/ipa/libipa/fixedpoint.cpp
index 99eb662ddf4e..4b017e86a74f 100644
--- a/test/ipa/libipa/fixedpoint.cpp
+++ b/test/ipa/libipa/fixedpoint.cpp
@@ -68,7 +68,7 @@ protected:
 		 * The second 7.992 test is to test that unused bits don't
 		 * affect the result.
 		 */
-		std::map<double, uint16_t> testCases = {
+		std::map<double, int16_t> testCases = {
 			{ 7.992, 0x3ff },
 			{   0.2, 0x01a },
 			{  -0.2, 0x7e6 },
@@ -81,14 +81,14 @@ protected:
 
 		int ret;
 		for (const auto &testCase : testCases) {
-			ret = testSingleFixedPoint<4, 7, uint16_t>(testCase.first,
+			ret = testSingleFixedPoint<4, 7, int16_t>(testCase.first,
 								   testCase.second);
 			if (ret != TestPass)
 				return ret;
 		}
 
 		/* Special case with a superfluous one in the unused bits */
-		ret = testFixedToFloat<4, 7, uint16_t, double>(0xbff, 7.992);
+		ret = testFixedToFloat<4, 7, int16_t, double>(0xbff, 7.992);
 		if (ret != TestPass)
 			return ret;