diff --git a/RTCP/Cobalt/GPUProc/src/Kernels/FIR_FilterKernel.h b/RTCP/Cobalt/GPUProc/src/Kernels/FIR_FilterKernel.h
index 7c7fbc779f7b6b1608859b8b80748655439c31b9..63a6605f45bbe0f6beae8af9624e7fce7d0f5b9c 100644
--- a/RTCP/Cobalt/GPUProc/src/Kernels/FIR_FilterKernel.h
+++ b/RTCP/Cobalt/GPUProc/src/Kernels/FIR_FilterKernel.h
@@ -119,7 +119,7 @@ namespace LOFAR
 
       void enqueue(const BlockID &blockId,
                    unsigned subbandIdx,
-                   double subbandFreqyency=0.0); // needed for Doppler corr.
+                   double subbandFrequency=0.0); // needed for Doppler corr.
 
       // Put the historyFlags[subbandIdx] in front of the given inputFlags,
       // and update historyFlags[subbandIdx] with the flags of the last samples