diff --git a/glm/ext/scalar_integer.inl b/glm/ext/scalar_integer.inl
index 28e48d7a..efba9600 100644
--- a/glm/ext/scalar_integer.inl
+++ b/glm/ext/scalar_integer.inl
@@ -178,7 +178,7 @@ namespace detail
 	{
 		GLM_STATIC_ASSERT(std::numeric_limits<genIUType>::is_integer, "'prevPowerOfTwo' only accept integer inputs");
 
-		return isPowerOfTwo(value) ? value : static_cast<genIUType>(1) << static_cast<genIUType>(findMSB(value));
+		return isPowerOfTwo(value) ? value : static_cast<genIUType>(static_cast<genIUType>(1) << static_cast<genIUType>(findMSB(value)));
 	}
 
 	template<typename genIUType>
diff --git a/test/ext/ext_scalar_integer.cpp b/test/ext/ext_scalar_integer.cpp
index 3b2c4c15..f169e8a3 100644
--- a/test/ext/ext_scalar_integer.cpp
+++ b/test/ext/ext_scalar_integer.cpp
@@ -645,12 +645,12 @@ namespace findNSB
 		Error += run<glm::uint16>();
 		Error += run<glm::uint32>();
 		Error += run<glm::uint64>();
-/*
+
 		Error += run<glm::int8>();
 		Error += run<glm::int16>();
 		Error += run<glm::int32>();
 		Error += run<glm::int64>();
-*/
+
 		return Error;
 	}
 }//namespace findNSB
diff --git a/test/ext/ext_vector_integer.cpp b/test/ext/ext_vector_integer.cpp
index 63792e9e..d7278d38 100644
--- a/test/ext/ext_vector_integer.cpp
+++ b/test/ext/ext_vector_integer.cpp
@@ -507,6 +507,27 @@ namespace findNSB
 		Error += run<3, glm::uint64>();
 		Error += run<4, glm::uint64>();
 
+		Error += run<1, glm::int8>();
+		Error += run<2, glm::int8>();
+		Error += run<3, glm::int8>();
+		Error += run<4, glm::int8>();
+
+		Error += run<1, glm::int16>();
+		Error += run<2, glm::int16>();
+		Error += run<3, glm::int16>();
+		Error += run<4, glm::int16>();
+
+		Error += run<1, glm::int32>();
+		Error += run<2, glm::int32>();
+		Error += run<3, glm::int32>();
+		Error += run<4, glm::int32>();
+
+		Error += run<1, glm::int64>();
+		Error += run<2, glm::int64>();
+		Error += run<3, glm::int64>();
+		Error += run<4, glm::int64>();
+
+
 		return Error;
 	}
 }//namespace findNSB