diff --git a/include/core/SkString.h b/include/core/SkString.h
index ba6cf52912..e4bd7b7a73 100644
--- a/include/core/SkString.h
+++ b/include/core/SkString.h
@@ -105,7 +105,7 @@ static constexpr int kSkStrAppendScalar_MaxSize = 15;
  *  Thus if the caller wants to add a 0 at the end, buffer must be at least
  *  kSkStrAppendScalar_MaxSize + 1 bytes large.
  */
-char* SkStrAppendScalar(char buffer[], float);
+char* SkStrAppendScalar(char buffer[], SkScalar);
 
 /** \class SkString
 
diff --git a/src/core/SkString.cpp b/src/core/SkString.cpp
index 89c1e4d0c6..3ed9636ef0 100644
--- a/src/core/SkString.cpp
+++ b/src/core/SkString.cpp
@@ -150,7 +150,7 @@ char* SkStrAppendS64(char string[], int64_t dec, int minDigits) {
     return SkStrAppendU64(string, udec, minDigits);
 }
 
-char* SkStrAppendScalar(char string[], float value) {
+char* SkStrAppendScalar(char string[], SkScalar value) {
     // since floats have at most 8 significant digits, we limit our %g to that.
     static const char gFormat[] = "%.8g";
     // make it 1 larger for the terminating 0