diff --git a/include/clad/Differentiator/Differentiator.h b/include/clad/Differentiator/Differentiator.h
index b6f4e8474..a686e35ef 100644
--- a/include/clad/Differentiator/Differentiator.h
+++ b/include/clad/Differentiator/Differentiator.h
@@ -28,16 +28,15 @@ template <typename T, typename U> struct ValueAndAdjoint {
 
   /// \returns the size of a c-style string
 inline CUDA_HOST_DEVICE unsigned int GetLength(const char* code) {
-  unsigned int count;
   const char* code_copy = code;
 #ifdef __CUDACC__
-  count = 0;
+  unsigned int count = 0;
   while (*code_copy != '\0') {
     count++;
     code_copy++;
   }
 #else
-  count = strlen(code_copy);
+  unsigned int count = strlen(code_copy);
 #endif
   return count;
 }