diff --git a/lib/checkother.cpp b/lib/checkother.cpp
index 966334130..582e565b6 100644
--- a/lib/checkother.cpp
+++ b/lib/checkother.cpp
@@ -2476,7 +2476,7 @@ void CheckOther::checkMathFunctions()
         }
         // acos( x ), asin( x )  where x is defined for intervall [-1,+1], but not beyound
         else if (Token::Match(tok, "acos|asin ( %num% )") &&
-                 fabs(MathLib::toDoubleNumber(tok->tokAt(2)->str())) > 1.0)
+                 std::fabs(MathLib::toDoubleNumber(tok->tokAt(2)->str())) > 1.0)
         {
             mathfunctionCallError(tok);
         }