diff --git a/cmd/wuffs-c/release.go b/cmd/wuffs-c/release.go
index 1223c06..c7a3ca0 100644
--- a/cmd/wuffs-c/release.go
+++ b/cmd/wuffs-c/release.go
@@ -172,6 +172,7 @@
 // __GNUC__, clang-cl (which mimics MSVC's cl.exe) does not.
 #if defined(__GNUC__)
 #pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wimplicit-fallthrough"
 #pragma GCC diagnostic ignored "-Wmissing-field-initializers"
 #pragma GCC diagnostic ignored "-Wunreachable-code"
 #pragma GCC diagnostic ignored "-Wunused-function"
@@ -181,6 +182,7 @@
 #endif
 #elif defined(__clang__)
 #pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wimplicit-fallthrough"
 #pragma clang diagnostic ignored "-Wmissing-field-initializers"
 #pragma clang diagnostic ignored "-Wunreachable-code"
 #pragma clang diagnostic ignored "-Wunused-function"
diff --git a/release/c/wuffs-unsupported-snapshot.c b/release/c/wuffs-unsupported-snapshot.c
index 334d9fd..1c8a360 100644
--- a/release/c/wuffs-unsupported-snapshot.c
+++ b/release/c/wuffs-unsupported-snapshot.c
@@ -15,6 +15,7 @@
 // __GNUC__, clang-cl (which mimics MSVC's cl.exe) does not.
 #if defined(__GNUC__)
 #pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wimplicit-fallthrough"
 #pragma GCC diagnostic ignored "-Wmissing-field-initializers"
 #pragma GCC diagnostic ignored "-Wunreachable-code"
 #pragma GCC diagnostic ignored "-Wunused-function"
@@ -24,6 +25,7 @@
 #endif
 #elif defined(__clang__)
 #pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wimplicit-fallthrough"
 #pragma clang diagnostic ignored "-Wmissing-field-initializers"
 #pragma clang diagnostic ignored "-Wunreachable-code"
 #pragma clang diagnostic ignored "-Wunused-function"