diff --git a/src/nvim/indent_c.c b/src/nvim/indent_c.c
index 3def0defe3..17fadc4bfd 100644
--- a/src/nvim/indent_c.c
+++ b/src/nvim/indent_c.c
@@ -857,13 +857,27 @@ static int cin_isfuncdecl(char_u **sp, linenr_T first_lnum, linenr_T min_lnum)
     return FALSE;
 
   while (*s && *s != '(' && *s != ';' && *s != '\'' && *s != '"') {
-    if (cin_iscomment(s))       /* ignore comments */
+    // ignore comments
+    if (cin_iscomment(s)) {
       s = cin_skipcomment(s);
-    else
-      ++s;
+    } else if (*s == ':') {
+      if (*(s + 1) == ':') {
+        s += 2;
+      } else {
+        // To avoid a mistake in the following situation:
+        // A::A(int a, int b)
+        //     : a(0)  // <--not a function decl
+        //     , b(0)
+        // {...
+        return false;
+      }
+    } else {
+      s++;
+    }
+  }
+  if (*s != '(') {
+    return false;  // ';', ' or "  before any () or no '('
   }
-  if (*s != '(')
-    return FALSE;               /* ';', ' or "  before any () or no '(' */
 
   while (*s && *s != ';' && *s != '\'' && *s != '"') {
     if (*s == ')' && cin_nocode(s + 1)) {
diff --git a/src/nvim/version.c b/src/nvim/version.c
index 5a46049e27..c6bb094cf6 100644
--- a/src/nvim/version.c
+++ b/src/nvim/version.c
@@ -376,7 +376,7 @@ static int included_patches[] = {
   915,
   // 914,
   // 913 NA
-  // 912,
+  912,
   // 911 NA
   // 910 NA
   // 909,
diff --git a/test/functional/legacy/003_cindent_spec.lua b/test/functional/legacy/003_cindent_spec.lua
index 9831c7a7d8..4b838eda1d 100644
--- a/test/functional/legacy/003_cindent_spec.lua
+++ b/test/functional/legacy/003_cindent_spec.lua
@@ -674,6 +674,13 @@ describe('cindent', function()
       {
       }
       
+      A::A(int a, int b)
+      : aa(a),
+      bb(b),
+      cc(c)
+      {
+      }
+      
       class CAbc :
          public BaseClass1,
          protected BaseClass2
@@ -1629,6 +1636,13 @@ describe('cindent', function()
       {
       }
       
+      A::A(int a, int b)
+      	: aa(a),
+      	bb(b),
+      	cc(c)
+      {
+      }
+      
       class CAbc :
       	public BaseClass1,
       	protected BaseClass2