diff --git a/include/pocketpy/common/config.h b/include/pocketpy/common/config.h
index 242c5cd1..be288768 100644
--- a/include/pocketpy/common/config.h
+++ b/include/pocketpy/common/config.h
@@ -38,7 +38,9 @@
 #define PK_DEBUG_NO_AUTO_GC         0
 #define PK_DEBUG_GC_STATS           0
 #define PK_DEBUG_COMPILER           0
+#ifndef PK_DEBUG_DATASTRUCTURE
 #define PK_DEBUG_DATASTRUCTURE      0
+#endif
 
 #ifndef PK_DEBUG_PRECOMPILED_EXEC
 #define PK_DEBUG_PRECOMPILED_EXEC   0
diff --git a/src/common/sourcedata.c b/src/common/sourcedata.c
index 8e18ac2f..c38f1f90 100644
--- a/src/common/sourcedata.c
+++ b/src/common/sourcedata.c
@@ -30,7 +30,7 @@ void pkpy_SourceData__ctor(struct pkpy_SourceData* self,
     pkpy_Str__take_buf(&self->source, buf, len);
 
     self->is_precompiled = (strncmp(pkpy_Str__data(&self->source), "pkpy:", 5) == 0);
-    c11_vector__push_back(const char*, &self->line_starts, pkpy_Str__data(&self->source));
+    c11_vector__push(const char*, &self->line_starts, pkpy_Str__data(&self->source));
 }
 
 void pkpy_SourceData__dtor(struct pkpy_SourceData* self) {
diff --git a/src/common/sstream.c b/src/common/sstream.c
index f4b2b395..117c2021 100644
--- a/src/common/sstream.c
+++ b/src/common/sstream.c
@@ -11,13 +11,13 @@ void pkpy_SStream__dtor(pkpy_SStream* self) {
 
 void pkpy_SStream__append_cstr(pkpy_SStream* self, const char* str) {
     for (int i = 0; str[i] != '\0'; i++) {
-        c11_vector__push_back(char, &self->data, str[i]);
+        c11_vector__push(char, &self->data, str[i]);
     }
 }
 
 void pkpy_SStream__append_cstrn(pkpy_SStream* self, const char* str, int n) {
     for (int i = 0; i < n; i++) {
-        c11_vector__push_back(char, &self->data, str[i]);
+        c11_vector__push(char, &self->data, str[i]);
     }
 }
 
@@ -26,7 +26,7 @@ void pkpy_SStream__append_Str(pkpy_SStream* self, const pkpy_Str* str) {
 }
 
 void pkpy_SStream__append_char(pkpy_SStream* self, char c) {
-    c11_vector__push_back(char, &self->data, c);
+    c11_vector__push(char, &self->data, c);
 }
 
 void pkpy_SStream__append_int(pkpy_SStream* self, int i) {
diff --git a/src/compiler/lexer.cpp b/src/compiler/lexer.cpp
index 29a388f3..42c54632 100644
--- a/src/compiler/lexer.cpp
+++ b/src/compiler/lexer.cpp
@@ -99,7 +99,7 @@ char Lexer::eatchar_include_newline() noexcept{
     curr_char++;
     if(c == '\n') {
         current_line++;
-        c11_vector__push_back(const char*, &src->line_starts, curr_char);
+        c11_vector__push(const char*, &src->line_starts, curr_char);
     }
     return c;
 }
@@ -571,7 +571,7 @@ Error* Lexer::from_precompiled() noexcept{
     int count = deserializer.read_count();
     auto precompiled_tokens = &src->_precompiled_tokens;
     for(int i = 0; i < count; i++) {
-        c11_vector__push_back(Str, precompiled_tokens, Str(deserializer.read_string('\n')));
+        c11_vector__push(Str, precompiled_tokens, Str(deserializer.read_string('\n')));
     }
 
     count = deserializer.read_count();