diff --git a/libc/include/stdlib.h b/libc/include/stdlib.h
index ef97538..6888e8c 100644
--- a/libc/include/stdlib.h
+++ b/libc/include/stdlib.h
@@ -77,7 +77,7 @@
 unsigned long strtoul(const char* __s, char** __end_ptr, int __base);
 unsigned long long strtoull(const char* __s, char** __end_ptr, int __base);
 
-int posix_memalign(void** __memptr, size_t __alignment, size_t __size) __INTRODUCED_IN(16);
+int posix_memalign(void** __memptr, size_t __alignment, size_t __size) __INTRODUCED_IN(17);
 
 void* aligned_alloc(size_t __alignment, size_t __size) __INTRODUCED_IN(28);
 
diff --git a/libc/libc.arm.map b/libc/libc.arm.map
index 56e4189..ee05b16 100644
--- a/libc/libc.arm.map
+++ b/libc/libc.arm.map
@@ -710,7 +710,7 @@
     posix_fallocate; # introduced=21
     posix_fallocate64; # introduced=21
     posix_madvise; # introduced=23
-    posix_memalign; # introduced-arm=16 introduced-arm64=21 introduced-mips=16 introduced-mips64=21 introduced-x86=16 introduced-x86_64=21
+    posix_memalign; # introduced=17
     posix_openpt; # introduced=21
     ppoll; # introduced=21
     prctl;
diff --git a/libc/libc.arm64.map b/libc/libc.arm64.map
index 880ed80..5e6f991 100644
--- a/libc/libc.arm64.map
+++ b/libc/libc.arm64.map
@@ -656,7 +656,7 @@
     posix_fallocate; # introduced=21
     posix_fallocate64; # introduced=21
     posix_madvise; # introduced=23
-    posix_memalign; # introduced-arm=16 introduced-arm64=21 introduced-mips=16 introduced-mips64=21 introduced-x86=16 introduced-x86_64=21
+    posix_memalign; # introduced=17
     posix_openpt; # introduced=21
     ppoll; # introduced=21
     prctl;
diff --git a/libc/libc.map.txt b/libc/libc.map.txt
index b787ea5..6bbffba 100644
--- a/libc/libc.map.txt
+++ b/libc/libc.map.txt
@@ -734,7 +734,7 @@
     posix_fallocate; # introduced=21
     posix_fallocate64; # introduced=21
     posix_madvise; # introduced=23
-    posix_memalign; # introduced-arm=16 introduced-arm64=21 introduced-mips=16 introduced-mips64=21 introduced-x86=16 introduced-x86_64=21
+    posix_memalign; # introduced=17
     posix_openpt; # introduced=21
     ppoll; # introduced=21
     prctl;
diff --git a/libc/libc.mips.map b/libc/libc.mips.map
index ec3fe3a..cdba570 100644
--- a/libc/libc.mips.map
+++ b/libc/libc.mips.map
@@ -708,7 +708,7 @@
     posix_fallocate; # introduced=21
     posix_fallocate64; # introduced=21
     posix_madvise; # introduced=23
-    posix_memalign; # introduced-arm=16 introduced-arm64=21 introduced-mips=16 introduced-mips64=21 introduced-x86=16 introduced-x86_64=21
+    posix_memalign; # introduced=17
     posix_openpt; # introduced=21
     ppoll; # introduced=21
     prctl;
diff --git a/libc/libc.mips64.map b/libc/libc.mips64.map
index 880ed80..5e6f991 100644
--- a/libc/libc.mips64.map
+++ b/libc/libc.mips64.map
@@ -656,7 +656,7 @@
     posix_fallocate; # introduced=21
     posix_fallocate64; # introduced=21
     posix_madvise; # introduced=23
-    posix_memalign; # introduced-arm=16 introduced-arm64=21 introduced-mips=16 introduced-mips64=21 introduced-x86=16 introduced-x86_64=21
+    posix_memalign; # introduced=17
     posix_openpt; # introduced=21
     ppoll; # introduced=21
     prctl;
diff --git a/libc/libc.x86.map b/libc/libc.x86.map
index 9407b58..5cb0cf4 100644
--- a/libc/libc.x86.map
+++ b/libc/libc.x86.map
@@ -706,7 +706,7 @@
     posix_fallocate; # introduced=21
     posix_fallocate64; # introduced=21
     posix_madvise; # introduced=23
-    posix_memalign; # introduced-arm=16 introduced-arm64=21 introduced-mips=16 introduced-mips64=21 introduced-x86=16 introduced-x86_64=21
+    posix_memalign; # introduced=17
     posix_openpt; # introduced=21
     ppoll; # introduced=21
     prctl;
diff --git a/libc/libc.x86_64.map b/libc/libc.x86_64.map
index 880ed80..5e6f991 100644
--- a/libc/libc.x86_64.map
+++ b/libc/libc.x86_64.map
@@ -656,7 +656,7 @@
     posix_fallocate; # introduced=21
     posix_fallocate64; # introduced=21
     posix_madvise; # introduced=23
-    posix_memalign; # introduced-arm=16 introduced-arm64=21 introduced-mips=16 introduced-mips64=21 introduced-x86=16 introduced-x86_64=21
+    posix_memalign; # introduced=17
     posix_openpt; # introduced=21
     ppoll; # introduced=21
     prctl;