diff --git a/src/exception.cr b/src/exception.cr
index 4301bd916038..ec59a8cef462 100644
--- a/src/exception.cr
+++ b/src/exception.cr
@@ -30,8 +30,8 @@ struct CallStack
 
         while true
           ret = LibC.dladdr(makecontext_end, out info)
-          break if ret == 0 || info.sname.null?
-          break unless LibC.strcmp(info.sname, "makecontext") == 0
+          break if ret == 0 || info.dli_sname.null?
+          break unless LibC.strcmp(info.dli_sname, "makecontext") == 0
           makecontext_end += 1
         end
 
diff --git a/src/lib_c/i686-linux-gnu/c/dlfcn.cr b/src/lib_c/i686-linux-gnu/c/dlfcn.cr
index 7f5ee3f9bed4..a4120f479faf 100644
--- a/src/lib_c/i686-linux-gnu/c/dlfcn.cr
+++ b/src/lib_c/i686-linux-gnu/c/dlfcn.cr
@@ -1,9 +1,10 @@
 @[Link("dl")]
 lib LibC
-  RTLD_LAZY   = 0x00001
-  RTLD_NOW    = 0x00002
-  RTLD_GLOBAL = 0x00100
-  RTLD_LOCAL  =       0
+  RTLD_LAZY    = 0x00001
+  RTLD_NOW     = 0x00002
+  RTLD_GLOBAL  = 0x00100
+  RTLD_LOCAL   =       0
+  RTLD_DEFAULT = Pointer(Void).new(0)
 
   struct DlInfo
     dli_fname : Char*
diff --git a/src/lib_c/i686-linux-musl/c/dlfcn.cr b/src/lib_c/i686-linux-musl/c/dlfcn.cr
index b61e20a1fa7e..2f48a19e8092 100644
--- a/src/lib_c/i686-linux-musl/c/dlfcn.cr
+++ b/src/lib_c/i686-linux-musl/c/dlfcn.cr
@@ -1,8 +1,10 @@
 lib LibC
-  RTLD_LAZY   =   1
-  RTLD_NOW    =   2
-  RTLD_GLOBAL = 256
-  RTLD_LOCAL  =   0
+  RTLD_LAZY    =   1
+  RTLD_NOW     =   2
+  RTLD_GLOBAL  = 256
+  RTLD_LOCAL   =   0
+  RTLD_DEFAULT = Pointer(Void).new(0)
+  RTLD_NEXT    = Pointer(Void).new(-1)
 
   struct DlInfo
     dli_fname : Char*
diff --git a/src/lib_c/x86_64-linux-gnu/c/dlfcn.cr b/src/lib_c/x86_64-linux-gnu/c/dlfcn.cr
index 7f5ee3f9bed4..a4120f479faf 100644
--- a/src/lib_c/x86_64-linux-gnu/c/dlfcn.cr
+++ b/src/lib_c/x86_64-linux-gnu/c/dlfcn.cr
@@ -1,9 +1,10 @@
 @[Link("dl")]
 lib LibC
-  RTLD_LAZY   = 0x00001
-  RTLD_NOW    = 0x00002
-  RTLD_GLOBAL = 0x00100
-  RTLD_LOCAL  =       0
+  RTLD_LAZY    = 0x00001
+  RTLD_NOW     = 0x00002
+  RTLD_GLOBAL  = 0x00100
+  RTLD_LOCAL   =       0
+  RTLD_DEFAULT = Pointer(Void).new(0)
 
   struct DlInfo
     dli_fname : Char*
diff --git a/src/lib_c/x86_64-linux-musl/c/dlfcn.cr b/src/lib_c/x86_64-linux-musl/c/dlfcn.cr
index b61e20a1fa7e..2f48a19e8092 100644
--- a/src/lib_c/x86_64-linux-musl/c/dlfcn.cr
+++ b/src/lib_c/x86_64-linux-musl/c/dlfcn.cr
@@ -1,8 +1,10 @@
 lib LibC
-  RTLD_LAZY   =   1
-  RTLD_NOW    =   2
-  RTLD_GLOBAL = 256
-  RTLD_LOCAL  =   0
+  RTLD_LAZY    =   1
+  RTLD_NOW     =   2
+  RTLD_GLOBAL  = 256
+  RTLD_LOCAL   =   0
+  RTLD_DEFAULT = Pointer(Void).new(0)
+  RTLD_NEXT    = Pointer(Void).new(-1)
 
   struct DlInfo
     dli_fname : Char*
diff --git a/src/lib_c/x86_64-macosx-darwin/c/dlfcn.cr b/src/lib_c/x86_64-macosx-darwin/c/dlfcn.cr
index 67764314c22b..a2c1c5dc4351 100644
--- a/src/lib_c/x86_64-macosx-darwin/c/dlfcn.cr
+++ b/src/lib_c/x86_64-macosx-darwin/c/dlfcn.cr
@@ -1,9 +1,11 @@
 @[Link("dl")]
 lib LibC
-  RTLD_LAZY   = 0x1
-  RTLD_NOW    = 0x2
-  RTLD_GLOBAL = 0x8
-  RTLD_LOCAL  = 0x4
+  RTLD_LAZY    = 0x1
+  RTLD_NOW     = 0x2
+  RTLD_GLOBAL  = 0x8
+  RTLD_LOCAL   = 0x4
+  RTLD_DEFAULT = Pointer(Void).new(-2)
+  RTLD_NEXT    = Pointer(Void).new(-1)
 
   struct DlInfo
     dli_fname : Char*
diff --git a/src/lib_c/x86_64-portbld-freebsd/c/dlfcn.cr b/src/lib_c/x86_64-portbld-freebsd/c/dlfcn.cr
index 6e46cfe8f6a9..035ccf873319 100644
--- a/src/lib_c/x86_64-portbld-freebsd/c/dlfcn.cr
+++ b/src/lib_c/x86_64-portbld-freebsd/c/dlfcn.cr
@@ -1,8 +1,10 @@
 lib LibC
-  RTLD_LAZY   =     1
-  RTLD_NOW    =     2
-  RTLD_GLOBAL = 0x100
-  RTLD_LOCAL  =     0
+  RTLD_LAZY    =     1
+  RTLD_NOW     =     2
+  RTLD_GLOBAL  = 0x100
+  RTLD_LOCAL   =     0
+  RTLD_DEFAULT = Pointer(Void).new(-2)
+  RTLD_NEXT    = Pointer(Void).new(-1)
 
   struct DlInfo
     dli_fname : Char*