diff --git a/include/osg/Matrixd b/include/osg/Matrixd
index 80b0540fc..6b4dfc426 100644
--- a/include/osg/Matrixd
+++ b/include/osg/Matrixd
@@ -200,10 +200,8 @@ class OSG_EXPORT Matrixd
         /** invert the matrix rhs, automatically select invert_4x3 or invert_4x4. */
         inline bool invert( const Matrixd& rhs)
         {
-            if (rhs._mat[0][3]==0.0 && rhs._mat[1][3]==0.0 &&  rhs._mat[2][3]==0.0 && rhs._mat[3][3]==1.0)
-                return invert_4x3(rhs);
-            else
-                return invert_4x4(rhs);
+            bool is_4x3 = (rhs._mat[0][3]==0.0 && rhs._mat[1][3]==0.0 &&  rhs._mat[2][3]==0.0 && rhs._mat[3][3]==1.0);
+            return is_4x3 ? invert_4x3(rhs) :  invert_4x4(rhs);
         }
 
         /** 4x3 matrix invert, not right hand column is assumed to be 0,0,0,1. */
diff --git a/include/osg/Matrixf b/include/osg/Matrixf
index 19342948d..b68f5301a 100644
--- a/include/osg/Matrixf
+++ b/include/osg/Matrixf
@@ -200,10 +200,8 @@ class OSG_EXPORT Matrixf
         /** invert the matrix rhs, automatically select invert_4x3 or invert_4x4. */
         inline bool invert( const Matrixf& rhs)
         {
-            if (rhs._mat[0][3]==0.0 && rhs._mat[1][3]==0.0 &&  rhs._mat[2][3]==0.0 && rhs._mat[3][3]==1.0)
-                return invert_4x3(rhs);
-            else
-                return invert_4x4(rhs);
+            bool is_4x3 = (rhs._mat[0][3]==0.0f && rhs._mat[1][3]==0.0f &&  rhs._mat[2][3]==0.0f && rhs._mat[3][3]==1.0f);
+            return is_4x3 ? invert_4x3(rhs) :  invert_4x4(rhs);
         }
 
         /** 4x3 matrix invert, not right hand column is assumed to be 0,0,0,1. */