diff --git a/grpc.def b/grpc.def
index 7d33e085754..06db74cad58 100644
--- a/grpc.def
+++ b/grpc.def
@@ -199,7 +199,6 @@ EXPORTS
     gpr_format_message
     gpr_strdup
     gpr_asprintf
-    gpr_format_timespec
     gpr_mu_init
     gpr_mu_destroy
     gpr_mu_lock
diff --git a/src/core/lib/gprpp/inlined_vector.h b/src/core/lib/gprpp/inlined_vector.h
index 276d5a078d4..9c2e1314555 100644
--- a/src/core/lib/gprpp/inlined_vector.h
+++ b/src/core/lib/gprpp/inlined_vector.h
@@ -22,6 +22,7 @@
 #include <grpc/support/port_platform.h>
 
 #include <cassert>
+#include <cstring>
 
 #include "src/core/lib/gprpp/memory.h"
 
diff --git a/src/ruby/ext/grpc/rb_grpc_imports.generated.c b/src/ruby/ext/grpc/rb_grpc_imports.generated.c
index 1086b7dfcb9..4e235121e24 100644
--- a/src/ruby/ext/grpc/rb_grpc_imports.generated.c
+++ b/src/ruby/ext/grpc/rb_grpc_imports.generated.c
@@ -222,7 +222,6 @@ gpr_cpu_current_cpu_type gpr_cpu_current_cpu_import;
 gpr_format_message_type gpr_format_message_import;
 gpr_strdup_type gpr_strdup_import;
 gpr_asprintf_type gpr_asprintf_import;
-gpr_format_timespec_type gpr_format_timespec_import;
 gpr_mu_init_type gpr_mu_init_import;
 gpr_mu_destroy_type gpr_mu_destroy_import;
 gpr_mu_lock_type gpr_mu_lock_import;
@@ -471,7 +470,6 @@ void grpc_rb_load_imports(HMODULE library) {
   gpr_format_message_import = (gpr_format_message_type) GetProcAddress(library, "gpr_format_message");
   gpr_strdup_import = (gpr_strdup_type) GetProcAddress(library, "gpr_strdup");
   gpr_asprintf_import = (gpr_asprintf_type) GetProcAddress(library, "gpr_asprintf");
-  gpr_format_timespec_import = (gpr_format_timespec_type) GetProcAddress(library, "gpr_format_timespec");
   gpr_mu_init_import = (gpr_mu_init_type) GetProcAddress(library, "gpr_mu_init");
   gpr_mu_destroy_import = (gpr_mu_destroy_type) GetProcAddress(library, "gpr_mu_destroy");
   gpr_mu_lock_import = (gpr_mu_lock_type) GetProcAddress(library, "gpr_mu_lock");
diff --git a/src/ruby/ext/grpc/rb_grpc_imports.generated.h b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
index b4107641a48..f01c9c82482 100644
--- a/src/ruby/ext/grpc/rb_grpc_imports.generated.h
+++ b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
@@ -641,9 +641,6 @@ extern gpr_strdup_type gpr_strdup_import;
 typedef int(*gpr_asprintf_type)(char** strp, const char* format, ...) GPR_PRINT_FORMAT_CHECK(2, 3);
 extern gpr_asprintf_type gpr_asprintf_import;
 #define gpr_asprintf gpr_asprintf_import
-typedef char*(*gpr_format_timespec_type)(gpr_timespec);
-extern gpr_format_timespec_type gpr_format_timespec_import;
-#define gpr_format_timespec gpr_format_timespec_import
 typedef void(*gpr_mu_init_type)(gpr_mu* mu);
 extern gpr_mu_init_type gpr_mu_init_import;
 #define gpr_mu_init gpr_mu_init_import
diff --git a/test/core/surface/public_headers_must_be_c89.c b/test/core/surface/public_headers_must_be_c89.c
index 95deb1f17a3..9a79b468dd5 100644
--- a/test/core/surface/public_headers_must_be_c89.c
+++ b/test/core/surface/public_headers_must_be_c89.c
@@ -257,7 +257,6 @@ int main(int argc, char **argv) {
   printf("%lx", (unsigned long) gpr_cpu_current_cpu);
   printf("%lx", (unsigned long) gpr_strdup);
   printf("%lx", (unsigned long) gpr_asprintf);
-  printf("%lx", (unsigned long) gpr_format_timespec);
   printf("%lx", (unsigned long) gpr_mu_init);
   printf("%lx", (unsigned long) gpr_mu_destroy);
   printf("%lx", (unsigned long) gpr_mu_lock);