diff --git a/src/pulses/constant_pulses.jl b/src/pulses/constant_pulses.jl
index dc8bbb7ebab94e3cef0641f9035a91e3c4991c14..23e73b90c4fc5a022829e22aa7df860efb210dc3 100644
--- a/src/pulses/constant_pulses.jl
+++ b/src/pulses/constant_pulses.jl
@@ -45,7 +45,7 @@ duration(pulse::ConstantPulse) = pulse.duration
 phase(pulse::ConstantPulse) = pulse.phase
 frequency(pulse::ConstantPulse) = pulse.frequency
 flip_angle(pulse::ConstantPulse) = amplitude(pulse) * duration(pulse) * 360
-inverse_bandwidth(pulse::ConstantPulse) = duration(pulse) / 3.79098854
+inverse_bandwidth(pulse::ConstantPulse) = duration(pulse) * 4
 effective_time(pulse::ConstantPulse) = duration(pulse) / 2
 
 variables(::Type{<:ConstantPulse}) = [amplitude, duration, phase, frequency, flip_angle, inverse_bandwidth]