diff --git a/Sources/F53OSC/F53OSCMessage.m b/Sources/F53OSC/F53OSCMessage.m
index 6c8c156..18de99b 100644
--- a/Sources/F53OSC/F53OSCMessage.m
+++ b/Sources/F53OSC/F53OSCMessage.m
@@ -106,6 +106,7 @@ + (void) initialize
         NUMBER_FORMATTER = [[NSNumberFormatter alloc] init];
         NUMBER_FORMATTER.allowsFloats = YES;
         NUMBER_FORMATTER.locale = [NSLocale autoupdatingCurrentLocale];
+        NUMBER_FORMATTER.roundingMode = NSNumberFormatterRoundHalfUp;
     }
 }
 
diff --git a/Tests/F53OSCTests/F53OSCMessageTests.m b/Tests/F53OSCTests/F53OSCMessageTests.m
index d48ae0a..0f69b62 100644
--- a/Tests/F53OSCTests/F53OSCMessageTests.m
+++ b/Tests/F53OSCTests/F53OSCMessageTests.m
@@ -101,6 +101,7 @@ - (nullable id) oscMessageArgumentFromString:(NSString *)qsc typeTag:(NSString *
         NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
         [formatter setLocale:[NSLocale currentLocale]];
         [formatter setAllowsFloats:YES];
+        [formatter setRoundingMode:NSNumberFormatterRoundHalfUp];
         
         arg = [formatter numberFromString:qsc]; // 'i' or 'f'
     }