diff --git a/src/opts/SkSwizzler_opts.inc b/src/opts/SkSwizzler_opts.inc
index 648d2ee..ff80497 100644
--- a/src/opts/SkSwizzler_opts.inc
+++ b/src/opts/SkSwizzler_opts.inc
@@ -159,7 +159,7 @@
 SI uint32_t rgbA_to_CCCA(float c00, float c08, float c16, float a) {
     if constexpr (kFastUnpremul) {
         const float reciprocalA = reciprocal_alpha_times_255(a);
-        auto unpremul = [reciprocalA](float c) {
+        auto unpremul = [reciprocalA](float c) -> uint32_t {
             return unpremul_quick(reciprocalA, c);
         };
         return (uint32_t) a << 24
@@ -169,7 +169,7 @@
     } else {
         const float normalizedA = a * (1.0f / 255.0f);
         const float reciprocalA = reciprocal_alpha(normalizedA);
-        auto unpremul = [reciprocalA](float c) {
+        auto unpremul = [reciprocalA](float c) -> uint32_t {
             return unpremul_simulating_RP(reciprocalA, c);
         };
         return (uint32_t) a << 24